diff --git a/src/main/java/cam72cam/mod/ModCore.java b/src/main/java/cam72cam/mod/ModCore.java
index ed924e90..aceb1529 100644
--- a/src/main/java/cam72cam/mod/ModCore.java
+++ b/src/main/java/cam72cam/mod/ModCore.java
@@ -20,7 +20,6 @@
 import net.minecraft.client.resources.FolderResourcePack;
 import net.minecraft.client.resources.IResourcePack;
 import net.minecraft.client.resources.SimpleReloadableResourceManager;
-import net.minecraft.world.World;
 import net.minecraftforge.fml.common.Loader;
 import net.minecraftforge.fml.common.Mod.EventHandler;
 import net.minecraftforge.fml.common.SidedProxy;
@@ -28,6 +27,7 @@
 import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLServerStartedEvent;
+import net.minecraftforge.fml.relauncher.CoreModManager;
 import net.minecraftforge.fml.relauncher.Side;
 import net.minecraftforge.fml.relauncher.SideOnly;
 import org.apache.commons.io.FileUtils;
@@ -39,6 +39,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
+import java.lang.reflect.Field;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.ArrayList;
@@ -371,4 +372,28 @@ public static synchronized File cacheFile(Identifier id) {
         usedCacheFiles.add(f);
         return f;
     }
+
+    /* Loader Utils */
+    public static String loaderBrand() {
+        return "forge";
+    }
+
+    public static int mcVersion() {
+        return 11202;
+    }
+
+    private static Boolean isDev = null;
+
+    public static boolean isDevelopmentEnvironment() {
+        if (isDev == null) {
+            try {
+                Field field = CoreModManager.class.getDeclaredField("deobfuscatedEnvironment");
+                field.setAccessible(true);
+                isDev = field.getBoolean(null);
+            } catch (NoSuchFieldException | IllegalAccessException ignore) {
+                isDev = false;
+            }
+        }
+        return isDev;
+    }
 }
diff --git a/src/main/java/cam72cam/mod/UMCMixinPlugin.java b/src/main/java/cam72cam/mod/UMCMixinPlugin.java
index e5efbd11..78898473 100644
--- a/src/main/java/cam72cam/mod/UMCMixinPlugin.java
+++ b/src/main/java/cam72cam/mod/UMCMixinPlugin.java
@@ -28,7 +28,9 @@ public UMCMixinPlugin() {
                 if (file.isFile() && !CoreModManager.getReparseableCoremods().contains(file.getName())) {
                     //Due to FML's bad behaviour on processing FMLCorePluginContainsFMLMod we add here manually
                     CoreModManager.getIgnoredMods().remove(file.getName());
-                    CoreModManager.getReparseableCoremods().add(file.getName());
+                    if (!ModCore.isDevelopmentEnvironment()) {
+                        CoreModManager.getReparseableCoremods().add(file.getName());
+                    }
                 }
             } catch (URISyntaxException e) {
                 FMLLog.log.warn(e);