diff --git a/inject-generator/src/main/java/io/avaje/inject/generator/SimpleBeanProxyWriter.java b/inject-generator/src/main/java/io/avaje/inject/generator/SimpleBeanProxyWriter.java
index 5ed7c73b4..bcda182fe 100644
--- a/inject-generator/src/main/java/io/avaje/inject/generator/SimpleBeanProxyWriter.java
+++ b/inject-generator/src/main/java/io/avaje/inject/generator/SimpleBeanProxyWriter.java
@@ -108,7 +108,7 @@ private void writeClassEnd() {
   private void writeClassStart() {
     writer.append(Constants.AT_PROXY).eol();
     writer.append(Constants.AT_GENERATED).eol();
-    writer.append("public class %s%s extends %s {", shortName, suffix, shortName).eol().eol();
+    writer.append("public final class %s%s extends %s {", shortName, suffix, shortName).eol().eol();
   }
 
   private Writer createFileWriter() throws IOException {
diff --git a/inject-generator/src/main/java/io/avaje/inject/generator/SimpleBeanWriter.java b/inject-generator/src/main/java/io/avaje/inject/generator/SimpleBeanWriter.java
index 8901ffc69..b3dc480a4 100644
--- a/inject-generator/src/main/java/io/avaje/inject/generator/SimpleBeanWriter.java
+++ b/inject-generator/src/main/java/io/avaje/inject/generator/SimpleBeanWriter.java
@@ -227,7 +227,7 @@ private void writeClassStart() {
     if (beanReader.getBeanType().getNestingKind().isNested()) {
       shortName = shortName.replace(".", "$");
     }
-    writer.append("public class ").append(shortName).append(suffix).append(" ");
+    writer.append("public final class ").append(shortName).append(suffix).append(" ");
     if (beanReader.isRequestScopedController()) {
       writer.append("implements ");
       beanReader.factoryInterface(writer);
diff --git a/inject-generator/src/main/java/io/avaje/inject/generator/SimpleModuleWriter.java b/inject-generator/src/main/java/io/avaje/inject/generator/SimpleModuleWriter.java
index 52fd9a9a8..224db84ef 100644
--- a/inject-generator/src/main/java/io/avaje/inject/generator/SimpleModuleWriter.java
+++ b/inject-generator/src/main/java/io/avaje/inject/generator/SimpleModuleWriter.java
@@ -171,7 +171,7 @@ private void writeStartClass() {
     scopeInfo.buildAtInjectModule(writer);
 
     String interfaceType = scopeInfo.type().type();
-    writer.append("public class %s implements %s {", shortName, interfaceType).eol().eol();
+    writer.append("public final class %s implements %s {", shortName, interfaceType).eol().eol();
     scopeInfo.buildFields(writer);
     if (scopeInfo.addModuleConstructor()) {
       writeConstructor();