diff --git a/website/content/en/docs/main/concepts/services.md b/website/content/en/docs/main/concepts/services.md
index 1b078779..c704b0d4 100644
--- a/website/content/en/docs/main/concepts/services.md
+++ b/website/content/en/docs/main/concepts/services.md
@@ -220,7 +220,7 @@ metadata:
   name: iperf3-server
   namespace: default
   labels:
-    import.clusterlink.net/merge: true
+    import.clusterlink.net/merge: "true"
 spec:
   port:       5000
   sources:
diff --git a/website/content/en/docs/v0.4/concepts/services.md b/website/content/en/docs/v0.4/concepts/services.md
index 1b078779..c704b0d4 100644
--- a/website/content/en/docs/v0.4/concepts/services.md
+++ b/website/content/en/docs/v0.4/concepts/services.md
@@ -220,7 +220,7 @@ metadata:
   name: iperf3-server
   namespace: default
   labels:
-    import.clusterlink.net/merge: true
+    import.clusterlink.net/merge: "true"
 spec:
   port:       5000
   sources: