diff --git a/build.gradle.kts b/build.gradle.kts
index 40845b5..37e7e47 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -61,7 +61,7 @@ dependencies {
     testRuntimeOnly("org.junit.platform:junit-platform-launcher")
 
     //OAS
-    swaggerCodegen("org.openapitools:openapi-generator-cli:7.8.0")
+    swaggerCodegen("io.swagger.codegen.v3:swagger-codegen-cli:3.0.61")
     implementation("io.swagger.core.v3:swagger-annotations:2.2.22")
 }
 
@@ -72,7 +72,7 @@ swaggerSources {
         val validationTask = validation
         code(delegateClosureOf<GenerateSwaggerCode> {
             language = "spring"
-            components = listOf("models", "apis", "supportingFiles=ApiUtil.java")
+            components = listOf("models", "apis")
             code.rawOptions =
                 listOf("--ignore-file-override=" + file("${rootDir}/src/main/resources/.codegen-ignore").absolutePath)
             dependsOn(validationTask)
diff --git a/src/main/java/de/hmmh/pmt/ApiController.java b/src/main/java/de/hmmh/pmt/ApiController.java
index 5a242a9..550e965 100644
--- a/src/main/java/de/hmmh/pmt/ApiController.java
+++ b/src/main/java/de/hmmh/pmt/ApiController.java
@@ -1,17 +1,31 @@
 package de.hmmh.pmt;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
 import de.hmmh.pmt.oas.DefaultApi;
-import de.hmmh.pmt.oas.HelloOut;
+import de.hmmh.pmt.oas.models.HelloOut;
+import jakarta.servlet.http.HttpServletRequest;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 
+import java.util.Optional;
+
 @Controller
 @RequestMapping("${openapi.projectManagement.base-path:/api/v1}")
 public class ApiController implements DefaultApi {
-    
+
     @Override
-    public ResponseEntity<HelloOut> getHello() throws Exception {
+    public Optional<ObjectMapper> getObjectMapper() {
+        return Optional.empty();
+    }
+
+    @Override
+    public Optional<HttpServletRequest> getRequest() {
+        return Optional.empty();
+    }
+
+    @Override
+    public ResponseEntity<HelloOut> getHello() {
         HelloOut hello = new HelloOut();
         hello.setMsg("Hello World");
         return ResponseEntity.ok(hello);
diff --git a/src/main/java/de/hmmh/pmt/oas/.gitkeep b/src/main/java/de/hmmh/pmt/oas/.gitkeep
deleted file mode 100644
index e69de29..0000000
diff --git a/src/main/resources/gen-config.json b/src/main/resources/gen-config.json
index bf797af..3263eeb 100644
--- a/src/main/resources/gen-config.json
+++ b/src/main/resources/gen-config.json
@@ -1,20 +1,13 @@
 {
-    "library": "spring-boot",
-    "dateLibrary": "java8",
-    "hideGenerationTimestamp": true,
-    "modelPackage": "de.hmmh.pmt.oas",
+    "modelPackage": "de.hmmh.pmt.oas.models",
     "apiPackage": "de.hmmh.pmt.oas",
     "invokerPackage": "de.hmmh.pmt.oas",
-    "serializableModel": true,
-    "openApiNullable": false,
-    "useTags": true,
-    "useGzipFeature": true,
-    "unhandledException": true,
-    "useSpringBoot3": true,
-    "useSwaggerUI": true,
-    "importMappings": {
-        "ResourceSupport": "org.springframework.hateoas.RepresentationModel",
-        "Link": "org.springframework.hateoas.Link"
-    }
+    "java8": false,
+    "java11": true,
+    "dateLibrary": "java11",
+    "library": "spring-boot3",
+    "defaultInterfaces": false,
+    "hideGenerationTimestamp": true,
+    "serializableModel": true
 }