diff --git a/gradle.properties b/gradle.properties
index dd362ee..ad6bc36 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -8,7 +8,7 @@ org.gradle.jvmargs=-Xmx1G
 	loader_version=0.15.11
 
 # Mod Properties
-	mod_version = 1.0
+	mod_version = 1.1
 	maven_group = com.kasetoatz
 	archives_base_name = noexplosiongrief
 
diff --git a/src/main/java/com/kasetoatz/noexplosiongrief/config/Config.java b/src/main/java/com/kasetoatz/noexplosiongrief/config/Config.java
new file mode 100644
index 0000000..0f8c6f6
--- /dev/null
+++ b/src/main/java/com/kasetoatz/noexplosiongrief/config/Config.java
@@ -0,0 +1,67 @@
+package com.kasetoatz.noexplosiongrief.config;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonObject;
+import net.minecraft.client.MinecraftClient;
+import net.minecraft.util.crash.CrashException;
+import net.minecraft.util.crash.CrashReport;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+
+public class Config {
+    public static boolean blockCreeper = true;
+    public static boolean blockGhast = true;
+    public static boolean blockWither = true;
+
+    private static final File config = new File(MinecraftClient.getInstance().runDirectory, "config/noexplosiongrief.json");
+    private static final Gson gson = new GsonBuilder().setPrettyPrinting().create();
+
+    public static void load()
+    {
+        if (!config.exists())
+        {
+            save();
+            return;
+        }
+        try (FileReader reader = new FileReader(config))
+        {
+            JsonObject json = gson.fromJson(reader, JsonObject.class);
+            if (json.has("blockCreeper"))
+            {
+                blockCreeper = json.get("blockCreeper").getAsBoolean();
+            }
+            if (json.has("blockGhast"))
+            {
+                blockGhast = json.get("blockGhast").getAsBoolean();
+            }
+            if (json.has("blockWither"))
+            {
+                blockWither = json.get("blockWither").getAsBoolean();
+            }
+        }
+        catch (IOException exc)
+        {
+            throw new CrashException(CrashReport.create(exc, "Loading config file."));
+        }
+    }
+
+    public static void save()
+    {
+        JsonObject json = new JsonObject();
+        json.addProperty("blockCreeper", blockCreeper);
+        json.addProperty("blockGhast", blockGhast);
+        json.addProperty("blockWither", blockWither);
+        try (FileWriter writer = new FileWriter(config))
+        {
+            gson.toJson(json, writer);
+        }
+        catch (IOException exc)
+        {
+            throw new CrashException(CrashReport.create(exc, "Saving config file."));
+        }
+    }
+}
diff --git a/src/main/java/com/kasetoatz/noexplosiongrief/mixin/EntityMixin.java b/src/main/java/com/kasetoatz/noexplosiongrief/mixin/EntityMixin.java
index 9912198..f980489 100644
--- a/src/main/java/com/kasetoatz/noexplosiongrief/mixin/EntityMixin.java
+++ b/src/main/java/com/kasetoatz/noexplosiongrief/mixin/EntityMixin.java
@@ -1,10 +1,13 @@
 package com.kasetoatz.noexplosiongrief.mixin;
 
+import com.kasetoatz.noexplosiongrief.config.Config;
 import net.minecraft.block.BlockState;
 import net.minecraft.entity.Entity;
+import net.minecraft.entity.boss.WitherEntity;
 import net.minecraft.entity.mob.CreeperEntity;
 import net.minecraft.entity.mob.GhastEntity;
 import net.minecraft.entity.projectile.FireballEntity;
+import net.minecraft.entity.projectile.WitherSkullEntity;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.BlockView;
 import net.minecraft.world.explosion.Explosion;
@@ -15,10 +18,10 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
 
 @Mixin(Entity.class)
 public abstract class EntityMixin {
-    @Inject(method="canExplosionDestroyBlock", at = @At("RETURN"), cancellable = true)
+    @Inject(method="canExplosionDestroyBlock", at = @At("HEAD"), cancellable = true)
     public void onExplosion(Explosion explosion, BlockView world, BlockPos pos, BlockState state, float explosionPower, CallbackInfoReturnable<Boolean> cir) {
         Entity entity = (Entity)(Object)this;
-        if (entity instanceof CreeperEntity || (entity instanceof FireballEntity && ((FireballEntity)entity).getOwner() instanceof GhastEntity))
+        if ((entity instanceof CreeperEntity && Config.blockCreeper) || ((entity instanceof FireballEntity && ((FireballEntity)entity).getOwner() instanceof GhastEntity) && Config.blockGhast) || ((entity instanceof WitherSkullEntity && ((WitherSkullEntity)entity).getOwner() instanceof WitherEntity) && Config.blockWither))
         {
             cir.setReturnValue(false);
         }