diff --git a/src/main/java/com/bgsoftware/superiorskyblock/nms/NMSAlgorithms.java b/src/main/java/com/bgsoftware/superiorskyblock/nms/NMSAlgorithms.java
index c3a022e27..099cb03fd 100644
--- a/src/main/java/com/bgsoftware/superiorskyblock/nms/NMSAlgorithms.java
+++ b/src/main/java/com/bgsoftware/superiorskyblock/nms/NMSAlgorithms.java
@@ -18,6 +18,8 @@
 
 public interface NMSAlgorithms {
 
+    boolean isMappingsSupported();
+
     void registerCommand(BukkitCommand command);
 
     String parseSignLine(String original);
diff --git a/v1_12_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_12_R1/NMSAlgorithmsImpl.java b/v1_12_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_12_R1/NMSAlgorithmsImpl.java
index a4da077f3..608b12926 100644
--- a/v1_12_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_12_R1/NMSAlgorithmsImpl.java
+++ b/v1_12_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_12_R1/NMSAlgorithmsImpl.java
@@ -37,6 +37,11 @@ public NMSAlgorithmsImpl(SuperiorSkyblockPlugin plugin) {
         this.plugin = plugin;
     }
 
+    @Override
+    public boolean isMappingsSupported() {
+        return true;
+    }
+
     @Override
     public void registerCommand(BukkitCommand command) {
         ((CraftServer) plugin.getServer()).getCommandMap().register("superiorskyblock2", command);
diff --git a/v1_16_R3/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_16_R3/NMSAlgorithmsImpl.java b/v1_16_R3/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_16_R3/NMSAlgorithmsImpl.java
index 1070cb7a5..ec8d528b4 100644
--- a/v1_16_R3/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_16_R3/NMSAlgorithmsImpl.java
+++ b/v1_16_R3/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_16_R3/NMSAlgorithmsImpl.java
@@ -57,6 +57,11 @@ public NMSAlgorithmsImpl(SuperiorSkyblockPlugin plugin) {
         this.plugin = plugin;
     }
 
+    @Override
+    public boolean isMappingsSupported() {
+        return true;
+    }
+
     @Override
     public void registerCommand(BukkitCommand command) {
         ((CraftServer) plugin.getServer()).getCommandMap().register("superiorskyblock2", command);
diff --git a/v1_17_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_17_R1/NMSAlgorithmsImpl.java b/v1_17_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_17_R1/NMSAlgorithmsImpl.java
index 89f07ce9c..a8b0aac7a 100644
--- a/v1_17_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_17_R1/NMSAlgorithmsImpl.java
+++ b/v1_17_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_17_R1/NMSAlgorithmsImpl.java
@@ -51,12 +51,19 @@ public class NMSAlgorithmsImpl implements NMSAlgorithms {
         MENUS_HOLDER_CREATORS.put(InventoryType.SMOKER, MenuTileEntityFurnace::new);
     }
 
+    private static final String BUILT_AGAINST_MAPPING = "acd6e6c27e5a0a9440afba70a96c27c9";
+
     private final SuperiorSkyblockPlugin plugin;
 
     public NMSAlgorithmsImpl(SuperiorSkyblockPlugin plugin) {
         this.plugin = plugin;
     }
 
+    @Override
+    public boolean isMappingsSupported() {
+        return ((CraftMagicNumbers) CraftMagicNumbers.INSTANCE).getMappingsVersion().equals(BUILT_AGAINST_MAPPING);
+    }
+
     @Override
     public void registerCommand(BukkitCommand command) {
         ((CraftServer) plugin.getServer()).getCommandMap().register("superiorskyblock2", command);
diff --git a/v1_18_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_18_R1/NMSAlgorithmsImpl.java b/v1_18_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_18_R1/NMSAlgorithmsImpl.java
index 43fca453c..45be8ecb6 100644
--- a/v1_18_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_18_R1/NMSAlgorithmsImpl.java
+++ b/v1_18_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_18_R1/NMSAlgorithmsImpl.java
@@ -51,12 +51,19 @@ public final class NMSAlgorithmsImpl implements NMSAlgorithms {
         MENUS_HOLDER_CREATORS.put(InventoryType.SMOKER, MenuTileEntityFurnace::new);
     }
 
+    private static final String BUILT_AGAINST_MAPPING = "20b026e774dbf715e40a0b2afe114792";
+
     private final SuperiorSkyblockPlugin plugin;
 
     public NMSAlgorithmsImpl(SuperiorSkyblockPlugin plugin) {
         this.plugin = plugin;
     }
 
+    @Override
+    public boolean isMappingsSupported() {
+        return ((CraftMagicNumbers) CraftMagicNumbers.INSTANCE).getMappingsVersion().equals(BUILT_AGAINST_MAPPING);
+    }
+
     @Override
     public void registerCommand(BukkitCommand command) {
         ((CraftServer) plugin.getServer()).getCommandMap().register("superiorskyblock2", command);
diff --git a/v1_18_R2/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_18_R2/NMSAlgorithmsImpl.java b/v1_18_R2/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_18_R2/NMSAlgorithmsImpl.java
index 6fc92578d..93461b1ba 100644
--- a/v1_18_R2/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_18_R2/NMSAlgorithmsImpl.java
+++ b/v1_18_R2/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_18_R2/NMSAlgorithmsImpl.java
@@ -51,12 +51,19 @@ public final class NMSAlgorithmsImpl implements NMSAlgorithms {
         MENUS_HOLDER_CREATORS.put(InventoryType.SMOKER, MenuTileEntityFurnace::new);
     }
 
+    private static final String BUILT_AGAINST_MAPPING = "eaeedbff51b16ead3170906872fda334";
+
     private final SuperiorSkyblockPlugin plugin;
 
     public NMSAlgorithmsImpl(SuperiorSkyblockPlugin plugin) {
         this.plugin = plugin;
     }
 
+    @Override
+    public boolean isMappingsSupported() {
+        return ((CraftMagicNumbers) CraftMagicNumbers.INSTANCE).getMappingsVersion().equals(BUILT_AGAINST_MAPPING);
+    }
+
     @Override
     public void registerCommand(BukkitCommand command) {
         ((CraftServer) plugin.getServer()).getCommandMap().register("superiorskyblock2", command);
diff --git a/v1_19_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_19_R1/NMSAlgorithmsImpl.java b/v1_19_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_19_R1/NMSAlgorithmsImpl.java
index 74a67dca4..2a1372e78 100644
--- a/v1_19_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_19_R1/NMSAlgorithmsImpl.java
+++ b/v1_19_R1/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_19_R1/NMSAlgorithmsImpl.java
@@ -51,12 +51,19 @@ public final class NMSAlgorithmsImpl implements NMSAlgorithms {
         MENUS_HOLDER_CREATORS.put(InventoryType.SMOKER, MenuTileEntityFurnace::new);
     }
 
+    private static final String BUILT_AGAINST_MAPPING = "4cc0cc97cac491651bff3af8b124a214";
+
     private final SuperiorSkyblockPlugin plugin;
 
     public NMSAlgorithmsImpl(SuperiorSkyblockPlugin plugin) {
         this.plugin = plugin;
     }
 
+    @Override
+    public boolean isMappingsSupported() {
+        return ((CraftMagicNumbers) CraftMagicNumbers.INSTANCE).getMappingsVersion().equals(BUILT_AGAINST_MAPPING);
+    }
+
     @Override
     public void registerCommand(BukkitCommand command) {
         ((CraftServer) plugin.getServer()).getCommandMap().register("superiorskyblock2", command);
diff --git a/v1_8_R3/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_8_R3/NMSAlgorithmsImpl.java b/v1_8_R3/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_8_R3/NMSAlgorithmsImpl.java
index 1c0ab0714..7a56c384e 100644
--- a/v1_8_R3/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_8_R3/NMSAlgorithmsImpl.java
+++ b/v1_8_R3/src/main/java/com/bgsoftware/superiorskyblock/nms/v1_8_R3/NMSAlgorithmsImpl.java
@@ -37,6 +37,11 @@ public NMSAlgorithmsImpl(SuperiorSkyblockPlugin plugin) {
         this.plugin = plugin;
     }
 
+    @Override
+    public boolean isMappingsSupported() {
+        return true;
+    }
+
     @Override
     public void registerCommand(BukkitCommand command) {
         ((CraftServer) plugin.getServer()).getCommandMap().register("superiorskyblock2", command);