diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index cef858ddc..3751cdf10 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -5,15 +5,15 @@ binaryCompatibilityValidator = "0.16.3"
 coroutines = "1.8.1"
 detekt = "1.23.7"
 junit = "4.13.2"
-kctfork = "0.5.1"
-kotlin = "2.0.21"
+kctfork = "0.7.0-alpha01"
+kotlin = "2.1.0-RC"
 kotlinPoet = "1.18.1"
 kspVersion = "2.0.21-1.0.28"
 
 groupId = "de.jensklingenberg.ktorfit"
 ktorfit = "2.2.0"
 ktorfitKsp = "2.2.0-1.0.28"
-ktorfitCompiler = "2.1.0-2.0.21"
+ktorfitCompiler = "2.1.0-2.1.0-RC"
 ktorfitCallConverter = "2.2.0"
 ktorfitFlowConverter = "2.2.0"
 ktorfitResponseConverter = "2.2.0"
diff --git a/ktorfit-compiler-plugin/src/main/java/de/jensklingenberg/ktorfit/CreateFuncTransformer.kt b/ktorfit-compiler-plugin/src/main/java/de/jensklingenberg/ktorfit/CreateFuncTransformer.kt
index 5f2f4764a..dcb87001a 100644
--- a/ktorfit-compiler-plugin/src/main/java/de/jensklingenberg/ktorfit/CreateFuncTransformer.kt
+++ b/ktorfit-compiler-plugin/src/main/java/de/jensklingenberg/ktorfit/CreateFuncTransformer.kt
@@ -99,9 +99,7 @@ internal class CreateFuncTransformer(
                         type = implClassSymbol.defaultType,
                         symbol = newConstructor,
                         0,
-                        0,
-                        0,
-                        null,
+                        0
                     )
 
                 // Set _ExampleApiProvider() as argument for create<ExampleApi>()