diff --git a/Assets/BetterExtensions/Runtime/Extensions/TypeExtensions.cs b/Assets/BetterExtensions/Runtime/Extensions/TypeExtensions.cs
index 183060e..00603e1 100644
--- a/Assets/BetterExtensions/Runtime/Extensions/TypeExtensions.cs
+++ b/Assets/BetterExtensions/Runtime/Extensions/TypeExtensions.cs
@@ -139,16 +139,12 @@ public static IEnumerable<Type> GetAllInheritedTypesWithoutUnityObject(this Type
         
         public static bool IsAnonymous(this Type type)
         {
-            if (type.IsGenericType)
+            if (type.IsClass && type.IsSealed && type.Attributes.HasFlag(TypeAttributes.NotPublic))
             {
-                var d = type.GetGenericTypeDefinition();
-                if (d.IsClass && d.IsSealed && d.Attributes.HasFlag(TypeAttributes.NotPublic))
+                var attributes = type.GetCustomAttribute<CompilerGeneratedAttribute>(false);
+                if (attributes != null)
                 {
-                    var attributes = d.GetCustomAttribute<CompilerGeneratedAttribute>(false);
-                    if (attributes != null)
-                    {
-                        return true;
-                    }
+                    return true;
                 }
             }
 
diff --git a/Assets/BetterExtensions/package.json b/Assets/BetterExtensions/package.json
index 9ef7981..dd8a90b 100644
--- a/Assets/BetterExtensions/package.json
+++ b/Assets/BetterExtensions/package.json
@@ -1,7 +1,7 @@
 {
   "name": "com.uurha.betterextensions",
   "displayName": "Better Extensions",
-  "version": "1.5.4",
+  "version": "1.5.5",
   "unity": "2020.1",
   "description": "Unity extensions, serialize extension, async extension, string extension and UI extensions",
   "dependencies": {