diff --git a/app-files/apps.yaml b/app-files/apps.yaml
index 46aa44f..a64f60a 100644
--- a/app-files/apps.yaml
+++ b/app-files/apps.yaml
@@ -175,7 +175,7 @@ spec:
   sources:
     - repoURL: https://charts.openproject.org
       chart: openproject
-      targetRevision: 8.3.2
+      targetRevision: 9.0.0
       helm:
         releaseName: openproject
         valueFiles: