diff --git a/kustomize/roundcube-deployment.yaml b/kustomize/roundcube-deployment.yaml
index 495026c..a0c21d4 100644
--- a/kustomize/roundcube-deployment.yaml
+++ b/kustomize/roundcube-deployment.yaml
@@ -28,9 +28,9 @@ spec:
           - name: ROUNDCUBEMAIL_DB_TYPE
             value: sqlite
           - name: ROUNDCUBEMAIL_SMTP_USER
-            value: ""
+            value: " "
           - name: ROUNDCUBEMAIL_SMTP_PASS
-            value: ""
+            value: " "
         volumeMounts:
           - name: roundcube-persistent-storage
             mountPath: /var/roundcube