diff --git a/samples/client/petstore/apex/.openapi-generator/VERSION b/samples/client/petstore/apex/.openapi-generator/VERSION
index 83a328a9227..d99e7162d01 100644
--- a/samples/client/petstore/apex/.openapi-generator/VERSION
+++ b/samples/client/petstore/apex/.openapi-generator/VERSION
@@ -1 +1 @@
-4.1.0-SNAPSHOT
\ No newline at end of file
+5.0.0-SNAPSHOT
\ No newline at end of file
diff --git a/samples/client/petstore/csharp-netcore/OpenAPIClientCore/.openapi-generator/VERSION b/samples/client/petstore/csharp-netcore/OpenAPIClientCore/.openapi-generator/VERSION
index 83a328a9227..d99e7162d01 100644
--- a/samples/client/petstore/csharp-netcore/OpenAPIClientCore/.openapi-generator/VERSION
+++ b/samples/client/petstore/csharp-netcore/OpenAPIClientCore/.openapi-generator/VERSION
@@ -1 +1 @@
-4.1.0-SNAPSHOT
\ No newline at end of file
+5.0.0-SNAPSHOT
\ No newline at end of file