diff --git a/app-files/apps.yaml b/app-files/apps.yaml
index f9ef90d..a9bd050 100644
--- a/app-files/apps.yaml
+++ b/app-files/apps.yaml
@@ -140,7 +140,7 @@ spec:
   sources:
     - repoURL: https://charts.openproject.org
       chart: openproject
-      targetRevision: 10.0.3
+      targetRevision: 9.10.0
       helm:
         releaseName: openproject
         valueFiles: