diff --git a/README.md b/README.md
index cba932f..5b9093e 100644
--- a/README.md
+++ b/README.md
@@ -30,9 +30,9 @@ Default: None
 
 ```json
 "append-messages": {
-    200: " - Up",
-    404: " - Partial outage",
-    502: " - Down"
+    "200": " - Up",
+    "404": " - Partial outage",
+    "502": " - Down"
 }
 ```