diff --git a/pom.xml b/pom.xml
index c028e01..8d32e96 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>net.knarcraft</groupId>
     <artifactId>BooksWithoutBorders</artifactId>
-    <version>1.0</version>
+    <version>1.1</version>
     <packaging>jar</packaging>
 
     <licenses>
@@ -20,7 +20,7 @@
 
     <description>A continuation of the original Books Without Borders</description>
     <properties>
-        <java.version>16</java.version>
+        <java.version>17</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
@@ -31,8 +31,8 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
-                    <source>${java.version}</source>
-                    <target>${java.version}</target>
+                    <source>17</source>
+                    <target>17</target>
                 </configuration>
             </plugin>
             <plugin>
@@ -75,7 +75,7 @@
         <dependency>
             <groupId>org.spigotmc</groupId>
             <artifactId>spigot-api</artifactId>
-            <version>1.17.1-R0.1-SNAPSHOT</version>
+            <version>1.18.1-R0.1-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
@@ -84,5 +84,11 @@
             <version>1.7</version>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>org.jetbrains</groupId>
+            <artifactId>annotations</artifactId>
+            <version>23.0.0</version>
+            <scope>compile</scope>
+        </dependency>
     </dependencies>
 </project>
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandBooksWithoutBorders.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandBooksWithoutBorders.java
index bf7e494..85be445 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandBooksWithoutBorders.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandBooksWithoutBorders.java
@@ -8,6 +8,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.PluginCommand;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -24,7 +25,7 @@ public class CommandBooksWithoutBorders implements TabExecutor {
     private final BooksWithoutBorders booksWithoutBorders = BooksWithoutBorders.getInstance();
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         sender.sendMessage(getCommandColor() + "[] denote optional parameters");
         sender.sendMessage(getCommandColor() + "<> denote required parameters");
         sender.sendMessage(getCommandColor() + "In some cases, commands with required parameters can be called with no parameters");
@@ -107,7 +108,7 @@ public class CommandBooksWithoutBorders implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
         return new ArrayList<>();
     }
 }
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandCopy.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandCopy.java
index 3d1d98b..7aadb5c 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandCopy.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandCopy.java
@@ -11,6 +11,7 @@ import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.BookMeta;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -24,7 +25,7 @@ public class CommandCopy implements TabExecutor {
     private final BooksWithoutBorders booksWithoutBorders = BooksWithoutBorders.getInstance();
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         if (!(sender instanceof Player player)) {
             BooksWithoutBorders.sendErrorMessage(sender, "This command can only be used by a player!");
             return false;
@@ -46,8 +47,9 @@ public class CommandCopy implements TabExecutor {
             int copies = Integer.parseInt(args[0]);
             if (copies > 0) {
                 if (BooksWithoutBorders.getAuthorOnlyCopy() && !player.hasPermission("bookswithoutborders.bypassAuthorOnlyCopy")) {
-                    if (!isAuthor(player, (BookMeta) Objects.requireNonNull(heldBook.getItemMeta())))
+                    if (!isAuthor(player, (BookMeta) Objects.requireNonNull(heldBook.getItemMeta()))) {
                         return false;
+                    }
                 }
 
                 if (booksWithoutBorders.booksHavePrice() &&
@@ -86,7 +88,7 @@ public class CommandCopy implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
         int argumentCount = args.length;
         if (argumentCount == 1) {
             return TabCompletionHelper.getNumbers(1, 20);
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandDecrypt.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandDecrypt.java
index d202128..f9260ee 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandDecrypt.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandDecrypt.java
@@ -9,6 +9,7 @@ import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.BookMeta;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.util.ArrayList;
@@ -23,7 +24,7 @@ import static net.knarcraft.bookswithoutborders.BooksWithoutBordersSettings.getS
 public class CommandDecrypt implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         if (!(sender instanceof Player player)) {
             BooksWithoutBorders.sendErrorMessage(sender, "This command can only be used by a player!");
             return false;
@@ -102,7 +103,7 @@ public class CommandDecrypt implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
         int argumentCount = args.length;
         if (argumentCount == 1) {
             List<String> info = new ArrayList<>();
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandDelete.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandDelete.java
index d87cf28..d8fc3fd 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandDelete.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandDelete.java
@@ -7,6 +7,7 @@ import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.util.ArrayList;
@@ -21,7 +22,7 @@ import static net.knarcraft.bookswithoutborders.BooksWithoutBordersSettings.getS
 public class CommandDelete implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         if (!(sender instanceof Player)) {
             BooksWithoutBorders.sendErrorMessage(sender, "This command can only be used by a player!");
             return false;
@@ -107,14 +108,15 @@ public class CommandDelete implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
         return doTabCompletion(sender, args, false);
     }
 
     /**
      * Performs tab completion
-     * @param sender <p>The sender of the command</p>
-     * @param args <p>The arguments given</p>
+     *
+     * @param sender       <p>The sender of the command</p>
+     * @param args         <p>The arguments given</p>
      * @param deletePublic <p>Whether to delete a public book</p>
      * @return <p>A list of available arguments</p>
      */
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandDeletePublic.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandDeletePublic.java
index fc2be66..ceb8b6b 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandDeletePublic.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandDeletePublic.java
@@ -3,6 +3,7 @@ package net.knarcraft.bookswithoutborders.command;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
@@ -12,12 +13,12 @@ import java.util.List;
 public class CommandDeletePublic extends CommandDelete implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         return deleteBook(sender, args, true);
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         return doTabCompletion(sender, args, true);
     }
 
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandEncrypt.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandEncrypt.java
index d8490e2..9ee12f6 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandEncrypt.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandEncrypt.java
@@ -11,6 +11,7 @@ import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.BookMeta;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -21,7 +22,7 @@ import java.util.List;
 public class CommandEncrypt implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         if (performPreChecks(sender, args, 1, "You must specify a key to encrypt a book!") == null) {
             return false;
         }
@@ -96,13 +97,14 @@ public class CommandEncrypt implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         return doTabCompletion(args, false);
     }
 
     /**
      * Gets a list of string for tab completions
-     * @param args <p>The arguments given</p>
+     *
+     * @param args         <p>The arguments given</p>
      * @param groupEncrypt <p>Whether to auto-complete for group encryption</p>
      * @return <p>The strings to auto-complete</p>
      */
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandGive.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandGive.java
index a89d76f..745af1c 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandGive.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandGive.java
@@ -10,6 +10,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -22,7 +23,7 @@ public class CommandGive implements TabExecutor {
     private final BooksWithoutBorders booksWithoutBorders = BooksWithoutBorders.getInstance();
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         if (!(sender instanceof Player)) {
             BooksWithoutBorders.sendErrorMessage(sender, "This command can only be used by a player!");
             return false;
@@ -104,14 +105,15 @@ public class CommandGive implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
         return doTabCompletion(sender, args, false);
     }
 
     /**
      * Performs the actual tab completion
-     * @param sender <p>The sender of the command</p>
-     * @param args <p>The arguments given</p>
+     *
+     * @param sender     <p>The sender of the command</p>
+     * @param args       <p>The arguments given</p>
      * @param listPublic <p>Whether to list public files or player files</p>
      * @return <p>A list of available choices</p>
      */
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandGivePublic.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandGivePublic.java
index e0b28aa..39c50db 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandGivePublic.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandGivePublic.java
@@ -3,6 +3,7 @@ package net.knarcraft.bookswithoutborders.command;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
@@ -12,12 +13,12 @@ import java.util.List;
 public class CommandGivePublic extends CommandGive implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         return giveBook(sender, args, true, "public");
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         return doTabCompletion(sender, args, true);
     }
 
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandGroupEncrypt.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandGroupEncrypt.java
index 2ea6734..695b88c 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandGroupEncrypt.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandGroupEncrypt.java
@@ -7,6 +7,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.meta.BookMeta;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
@@ -16,7 +17,7 @@ import java.util.List;
 public class CommandGroupEncrypt extends CommandEncrypt implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         BookMeta bookMetadata = performPreChecks(sender, args, 2,
                 "You must specify a group name and key to encrypt a book!");
 
@@ -36,7 +37,7 @@ public class CommandGroupEncrypt extends CommandEncrypt implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         return doTabCompletion(args, true);
     }
 
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandLoad.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandLoad.java
index 39fd8d0..d987be0 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandLoad.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandLoad.java
@@ -9,6 +9,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -21,7 +22,7 @@ public class CommandLoad implements TabExecutor {
     private final BooksWithoutBorders booksWithoutBorders = BooksWithoutBorders.getInstance();
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         return loadBook(sender, args, "player", false);
     }
 
@@ -94,14 +95,15 @@ public class CommandLoad implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
         return doTabCompletion(sender, args, false);
     }
 
     /**
      * Performs the actual tab completion
-     * @param sender <p>The sender of the command</p>
-     * @param args <p>The arguments given</p>
+     *
+     * @param sender     <p>The sender of the command</p>
+     * @param args       <p>The arguments given</p>
      * @param loadPublic <p>Whether to list public files or player files</p>
      * @return <p>A list of available choices</p>
      */
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandLoadPublic.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandLoadPublic.java
index 0a1115e..2a756fe 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandLoadPublic.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandLoadPublic.java
@@ -3,6 +3,7 @@ package net.knarcraft.bookswithoutborders.command;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.List;
 
@@ -12,12 +13,12 @@ import java.util.List;
 public class CommandLoadPublic extends CommandLoad implements CommandExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         return loadBook(sender, args, "public", true);
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         return doTabCompletion(sender, args, true);
     }
 
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandReload.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandReload.java
index c1b1211..31fea94 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandReload.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandReload.java
@@ -4,6 +4,7 @@ import net.knarcraft.bookswithoutborders.BooksWithoutBorders;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -16,7 +17,7 @@ public class CommandReload implements TabExecutor {
     private final BooksWithoutBorders booksWithoutBorders = BooksWithoutBorders.getInstance();
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         if (booksWithoutBorders.loadConfig()) {
             BooksWithoutBorders.sendSuccessMessage(sender, "BooksWithoutBorders configuration reloaded!");
         } else {
@@ -27,7 +28,7 @@ public class CommandReload implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
         return new ArrayList<>();
     }
 }
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSave.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSave.java
index 4cb3a02..21d009b 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSave.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSave.java
@@ -11,6 +11,7 @@ import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.BookMeta;
+import org.jetbrains.annotations.NotNull;
 
 import java.io.File;
 import java.io.IOException;
@@ -31,7 +32,7 @@ import static net.knarcraft.bookswithoutborders.utility.InputCleaningHelper.fixN
 public class CommandSave implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         return saveHeldBook(sender, args, false);
     }
 
@@ -148,7 +149,7 @@ public class CommandSave implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
         return new ArrayList<>();
     }
 }
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSavePublic.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSavePublic.java
index b02eeae..a818ae1 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSavePublic.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSavePublic.java
@@ -3,6 +3,7 @@ package net.knarcraft.bookswithoutborders.command;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * Command executor for the save public command
@@ -10,7 +11,7 @@ import org.bukkit.command.TabExecutor;
 public class CommandSavePublic extends CommandSave implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         return saveHeldBook(sender, args, true);
     }
 
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetAuthor.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetAuthor.java
index bae8db6..69c9205 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetAuthor.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetAuthor.java
@@ -9,6 +9,7 @@ import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.BookMeta;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -19,7 +20,7 @@ import java.util.List;
 public class CommandSetAuthor implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         if (!(sender instanceof Player player)) {
             BooksWithoutBorders.sendErrorMessage(sender, "This command can only be used by a player!");
             return false;
@@ -49,7 +50,7 @@ public class CommandSetAuthor implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         if (args.length == 1) {
             return null;
         } else {
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetBookPrice.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetBookPrice.java
index e191a5b..47cdc9d 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetBookPrice.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetBookPrice.java
@@ -10,6 +10,7 @@ import org.bukkit.command.CommandSender;
 import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -22,7 +23,7 @@ public class CommandSetBookPrice implements TabExecutor {
     private final BooksWithoutBorders booksWithoutBorders = BooksWithoutBorders.getInstance();
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, String[] args) {
         //Clear the current price
         if (args.length == 0) {
             clearItemPrice(sender);
@@ -132,7 +133,7 @@ public class CommandSetBookPrice implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         int argumentCount = args.length;
         if (argumentCount == 1) {
             List<String> paymentTypes = new ArrayList<>();
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetLore.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetLore.java
index 2f27996..a2f481f 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetLore.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetLore.java
@@ -10,6 +10,7 @@ import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -21,7 +22,7 @@ import java.util.List;
 public class CommandSetLore implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         if (!(sender instanceof Player player)) {
             BooksWithoutBorders.sendErrorMessage(sender, "This command can only be used by a player!");
             return false;
@@ -59,7 +60,7 @@ public class CommandSetLore implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, String[] args) {
         //TODO: Figure out if there is a better way to display that an argument is required
         List<String> options = new ArrayList<>();
         options.add("<new lore>");
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetTitle.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetTitle.java
index 61dab74..d984dc2 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetTitle.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandSetTitle.java
@@ -11,6 +11,7 @@ import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.BookMeta;
 import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -21,7 +22,7 @@ import java.util.List;
 public class CommandSetTitle implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         if (!(sender instanceof Player player)) {
             BooksWithoutBorders.sendErrorMessage(sender, "This command can only be used by a player!");
             return false;
@@ -65,7 +66,7 @@ public class CommandSetTitle implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
         List<String> options = new ArrayList<>();
         options.add("<new title>");
         return options;
diff --git a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandUnSign.java b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandUnSign.java
index 510264b..4208d8a 100644
--- a/src/main/java/net/knarcraft/bookswithoutborders/command/CommandUnSign.java
+++ b/src/main/java/net/knarcraft/bookswithoutborders/command/CommandUnSign.java
@@ -10,6 +10,7 @@ import org.bukkit.command.TabExecutor;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.BookMeta;
+import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -20,7 +21,7 @@ import java.util.List;
 public class CommandUnSign implements TabExecutor {
 
     @Override
-    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
         if (!(sender instanceof Player player)) {
             BooksWithoutBorders.sendErrorMessage(sender, "This command can only be used by a player!");
             return false;
@@ -55,7 +56,7 @@ public class CommandUnSign implements TabExecutor {
     }
 
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
         return new ArrayList<>();
     }
 }
diff --git a/src/main/resources/plugin.yml b/src/main/resources/plugin.yml
index 4a98497..ea4a699 100644
--- a/src/main/resources/plugin.yml
+++ b/src/main/resources/plugin.yml
@@ -1,12 +1,12 @@
 name: BooksWithoutBorders
 version: '${project.version}'
 main: net.knarcraft.bookswithoutborders.BooksWithoutBorders
-api-version: 1.17
+api-version: 1.18
 prefix: Books Without Borders
 authors: [ EpicKnarvik97, AkiraAkiba ]
 description: A continuation of the original Books Without Borders
 softdepend: [ Vault ]
-website: ????
+website: https://www.spigotmc.org/resources/books-without-borders-updated.96069/
 dev-url: https://git.knarcraft.net/EpicKnarvik97/Books-Without-Borders
 commands:
   bookswithoutborders:
@@ -85,6 +85,10 @@ commands:
     description: Reloads BwB's configuration file
     usage: /<command>
     permission: bookswithoutborders.admin
+  formatbook:
+    description: Replaces color/formatting codes in a book with formatted text
+    usage: /<command>
+    permission: bookswithoutborders.format
 permissions:
   bookswithoutborders.*:
     description: Grants all permissions
@@ -112,12 +116,15 @@ permissions:
       bookswithoutborders.bypassbookprice: true
       bookswithoutborders.groupencrypt: true
       bookswithoutborders.setbookprice: true
+      bookswithoutborders.format: true
   bookswithoutborders.use:
     description: Allows player to use commands and to save/load/delete in their personal directory
     children:
       bookswithoutborders.save: true
       bookswithoutborders.load: true
       bookswithoutborders.delete: true
+  bookswithoutborders.format:
+    description: Allows a player to format a book
   bookswithoutborders.save:
     description: Allows player to save books to their personal directory
   bookswithoutborders.load:
diff --git a/src/test/java/net/knarcraft/bookswithoutborders/encryption/AESTest.java b/src/test/java/net/knarcraft/bookswithoutborders/encryption/AESTest.java
index d44b73d..963d31e 100644
--- a/src/test/java/net/knarcraft/bookswithoutborders/encryption/AESTest.java
+++ b/src/test/java/net/knarcraft/bookswithoutborders/encryption/AESTest.java
@@ -1,9 +1,9 @@
 package net.knarcraft.bookswithoutborders.encryption;
 
+import junit.framework.Assert;
 import org.junit.Test;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
+import static junit.framework.Assert.assertEquals;
 
 public class AESTest {
 
@@ -15,7 +15,7 @@ public class AESTest {
         AES aes = new AES(AES.generateIV(), AES.generateIV());
 
         String encrypted = aes.encryptDecryptText(plainText, password, true);
-        assertFalse(encrypted.equals(plainText));
+        Assert.assertNotSame(encrypted, plainText);
         String decrypted = aes.encryptDecryptText(encrypted, password, false);
         assertEquals(plainText, decrypted);
     }