diff --git a/src/main/java/de/dhbwstuttgart/bytecode/Codegen.java b/src/main/java/de/dhbwstuttgart/bytecode/Codegen.java
index 9d196167f..ee6047791 100644
--- a/src/main/java/de/dhbwstuttgart/bytecode/Codegen.java
+++ b/src/main/java/de/dhbwstuttgart/bytecode/Codegen.java
@@ -979,7 +979,7 @@ public class Codegen {
     }
 
     private void generateConstructor(TargetConstructor constructor) {
-        MethodVisitor mv = cw.visitMethod(constructor.access() | ACC_PUBLIC, "<init>", constructor.getDescriptor(), constructor.getSignature(), null);
+        MethodVisitor mv = cw.visitMethod(constructor.access() | ACC_PUBLIC, "<init>", constructor.getDescriptor(), null, null);
         mv.visitCode();
         var state = new State(null, mv, 1);
         for (var param: constructor.parameters())
@@ -1027,8 +1027,8 @@ public class Codegen {
     }
 
     public byte[] generate() {
-        cw.visit(V1_8, clazz.modifiers() | ACC_PUBLIC, clazz.qualifiedName(),
-                generateSignature(clazz), clazz.superType() != null ? clazz.superType().getInternalName(): "java/lang/Object",
+        cw.visit(V1_8, clazz.modifiers() | ACC_PUBLIC | ACC_SUPER, clazz.qualifiedName(),
+                null, clazz.superType() != null ? clazz.superType().getInternalName(): "java/lang/Object",
                 clazz.implementingInterfaces().stream().map(TargetType::toSignature).toArray(String[]::new)
         );
         clazz.fields().forEach(this::generateField);
diff --git a/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java b/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
index 67e553e65..ce312d01d 100644
--- a/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
+++ b/src/main/java/de/dhbwstuttgart/core/JavaTXCompiler.java
@@ -909,7 +909,7 @@ public class JavaTXCompiler {
 			// "/testBytecode/generatedBC/" +name+".class"));
 			File outputFile = new File(path, name.getClassName() + ".class");
 			outputFile.getAbsoluteFile().getParentFile().mkdirs();
-			output = new FileOutputStream(outputFile);
+			output = new FileOutputStream(outputFile, false);
 			output.write(bytecode);
 			output.close();
 			System.out.println(name + ".class file generated");