diff --git a/dependencies.gradle b/dependencies.gradle
index a966b8a..19c61a2 100644
--- a/dependencies.gradle
+++ b/dependencies.gradle
@@ -40,6 +40,9 @@ dependencies {
     //Biomes O' Plenty 2.1.0.2308
     compile(deobfCurse("biomesoplenty-220318:2499612"))
 
+    //Biome Tweaker 2.0.182
+    compileOnly(deobfCurse("biometweaker-228895:2279911"))
+
     //Biome Wand 1.1.9
     //Mirrored at: https://maven.falsepattern.com/mirror/mirror/1.7.10-Biome-Wand-1.1.9.jar
     compile(deobf("https://spacechase0.com/wp-content/uploads/2014/10/1.7.10-Biome-Wand-1.1.9.jar"))
diff --git a/src/main/java/com/falsepattern/endlessids/mixin/mixins/common/biometweaker/BiomeEventHandlerMixin.java b/src/main/java/com/falsepattern/endlessids/mixin/mixins/common/biometweaker/BiomeEventHandlerMixin.java
new file mode 100644
index 0000000..2cf2eb3
--- /dev/null
+++ b/src/main/java/com/falsepattern/endlessids/mixin/mixins/common/biometweaker/BiomeEventHandlerMixin.java
@@ -0,0 +1,54 @@
+package com.falsepattern.endlessids.mixin.mixins.common.biometweaker;
+
+import com.falsepattern.endlessids.constants.ExtendedConstants;
+import com.falsepattern.endlessids.constants.VanillaConstants;
+import me.superckl.biometweaker.common.handler.BiomeEventHandler;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Mutable;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Constant;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.ModifyConstant;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.util.Arrays;
+
+@Mixin(value = BiomeEventHandler.class,
+       remap = false)
+public abstract class BiomeEventHandlerMixin {
+    @Mutable
+    @Shadow
+    @Final
+    private int[] colorCache;
+
+    @ModifyConstant(method = "<clinit>",
+                    constant = @Constant(intValue = VanillaConstants.biomeIDCount),
+                    require = 1)
+    private static int extendIDs1(int constant) {
+        return ExtendedConstants.biomeIDCount;
+    }
+
+    @Inject(method = "<init>",
+            at = @At("RETURN"),
+            require = 1)
+    private void extendIDs2(CallbackInfo ci) {
+        colorCache = new int[ExtendedConstants.biomeIDCount * 3];
+        Arrays.fill(colorCache, -2);
+    }
+
+    @ModifyConstant(method = "onGetFoliageColor",
+                    constant = @Constant(intValue = VanillaConstants.biomeIDCount),
+                    require = 1)
+    private static int extendIDs3(int constant) {
+        return ExtendedConstants.biomeIDCount;
+    }
+
+    @ModifyConstant(method = "onGetWaterColor",
+                    constant = @Constant(intValue = VanillaConstants.biomeIDCount * 2),
+                    require = 1)
+    private static int extendIDs4(int constant) {
+        return ExtendedConstants.biomeIDCount * 2;
+    }
+}
diff --git a/src/main/java/com/falsepattern/endlessids/mixin/plugin/Mixin.java b/src/main/java/com/falsepattern/endlessids/mixin/plugin/Mixin.java
index 636ee83..e4d33f3 100644
--- a/src/main/java/com/falsepattern/endlessids/mixin/plugin/Mixin.java
+++ b/src/main/java/com/falsepattern/endlessids/mixin/plugin/Mixin.java
@@ -98,6 +98,9 @@ public enum Mixin implements IMixin {
     ChunkProviderBOPEndMixin(Side.COMMON, require(TargetedMod.BOP), "bop.ChunkProviderBOPEndMixin"),
     ChunkProviderBOPHellMixin(Side.COMMON, require(TargetedMod.BOP), "bop.ChunkProviderBOPHellMixin"),
     //endregion BoP->common
+    //region BiomeTweaker->common
+    BiomeEventHandlerMixin(Side.COMMON, require(TargetedMod.BIOMETWEAKER), "biometweaker.BiomeEventHandlerMixin"),
+    //endregion BiomeTweaker->common
     //region Biome Wand
     //region Biome Wand->client
     BiomeWandItemClientMixin(Side.CLIENT, require(TargetedMod.BIOMEWAND), "biomewand.BiomeWandItemMixin"),
diff --git a/src/main/java/com/falsepattern/endlessids/mixin/plugin/TargetedMod.java b/src/main/java/com/falsepattern/endlessids/mixin/plugin/TargetedMod.java
index 7f33037..7ee26c0 100644
--- a/src/main/java/com/falsepattern/endlessids/mixin/plugin/TargetedMod.java
+++ b/src/main/java/com/falsepattern/endlessids/mixin/plugin/TargetedMod.java
@@ -17,6 +17,7 @@ public enum TargetedMod implements ITargetedMod {
     ANTIIDCONFLICT("Anti ID Conflict", true, startsWith("antiidconflict")),
     ATUM("Atum", true, startsWith("atum-")),
     BOP("Biomes O' Plenty", true, startsWith("biomesoplenty-")),
+    BIOMETWEAKER("Biome Tweaker", true, startsWith("biometweaker-")),
     BIOMEWAND("Biome Wand", true, startsWith("1.7.10-biome-wand-").or(startsWith("biome-wand"))),
     COFHLIB("CoFH Lib", true, startsWith("cofhlib-")),
     DARKWORLD("Dark World", true, startsWith("darkworld-")),