diff --git a/manifest.yml b/manifest.yml
index f96d61ac..46d739d5 100644
--- a/manifest.yml
+++ b/manifest.yml
@@ -3,4 +3,4 @@ applications:
       - python_buildpack
     memory: 256M
     disk_quota: 512M
-    stack: cflinuxfs3
+    stack: cflinuxfs4