diff --git a/tandoor-system/tandoor.yaml b/tandoor-system/tandoor.yaml
index 63ce7c0..3ba7964 100644
--- a/tandoor-system/tandoor.yaml
+++ b/tandoor-system/tandoor.yaml
@@ -10,7 +10,7 @@ metadata:
   labels:
     app.kubernetes.io/instance: tandoor
     app.kubernetes.io/name: tandoor
-    app.kubernetes.io/version: 2.5
+    app.kubernetes.io/version: "2.5"
   name: tandoor
   namespace: tandoor-system
 spec:
@@ -26,7 +26,7 @@ spec:
       labels:
         app.kubernetes.io/instance: tandoor
         app.kubernetes.io/name: tandoor
-        app.kubernetes.io/version: 2.5
+        app.kubernetes.io/version: "2.5"
     spec:
       initContainers:
         - name: create-superuser