diff --git a/src/ExtendZodSchemaClass.ts b/src/ExtendZodSchemaClass.ts
index 9bc2c97..5038c48 100644
--- a/src/ExtendZodSchemaClass.ts
+++ b/src/ExtendZodSchemaClass.ts
@@ -6,7 +6,7 @@ import { Extend, StaticMembers } from "./util"
 
 
 export function ExtendZodSchemaClass<
-    Self                  extends (
+    Self extends (
         AbstractClass<
             TraitInstance<ZodSchemaObjectTrait<T, Catchall, Values, PartialValues>> & Values,
             [values: Values]
@@ -38,7 +38,7 @@ export function ExtendZodSchemaClass<
 ) {
     return expression
         .extends(
-            class_ as unknown as (
+            class_ as (
                 AbstractClass<
                     Omit<
                         Extend<[InstanceType<Self>, ExtendedValues]>,