diff --git a/docs/extend/plugin_api.md b/docs/extend/plugin_api.md
index e299a0991e..693b77a2f3 100644
--- a/docs/extend/plugin_api.md
+++ b/docs/extend/plugin_api.md
@@ -79,7 +79,7 @@ This is the JSON format for a plugin:
     "InsecureSkipVerify": false,
     "CAFile": "/usr/shared/docker/certs/example-ca.pem",
     "CertFile": "/usr/shared/docker/certs/example-cert.pem",
-    "KeyFile": "/usr/shared/docker/certs/example-key.pem",
+    "KeyFile": "/usr/shared/docker/certs/example-key.pem"
   }
 }
 ```