diff --git a/argocd/apps/openproject/values-openproject.yaml b/argocd/apps/openproject/values-openproject.yaml
index a39258d..10be86c 100644
--- a/argocd/apps/openproject/values-openproject.yaml
+++ b/argocd/apps/openproject/values-openproject.yaml
@@ -27,7 +27,7 @@ spec:
             IMAP_HOST: "smtp.innovation-hub-niedersachsen.de"
             IMAP_PORT: 993
             IMAP_SSL: "true"
-            IMAP_USER: "openproject"
+            IMAP_USERNAME: "openproject"
             IMAP_PASSWORD: "openproject-imap-password"
           schedule: "*/5 * * * *"  
         ingress: