diff --git a/docs/en/setup/backend/backend-health-check.md b/docs/en/setup/backend/backend-health-check.md
index ff94671406de112791b8efb39ce884d4f2762fc8..2bfbe063323cab14260b54db97da7cb4c65d333f 100644
--- a/docs/en/setup/backend/backend-health-check.md
+++ b/docs/en/setup/backend/backend-health-check.md
@@ -50,7 +50,7 @@ Once some modules are unhealthy, for instance, storage H2 is down. The result mi
   }
 }
 ```
-You could refer to [checkHealth query](https://github.com/apache/skywalking-query-protocol/blob/master/common.graphql)
+You could refer to [checkHealth query](https://github.com/apache/skywalking-query-protocol/blob/master/common.graphqls)
 for more details.
 
 ## The readiness of GraphQL and gRPC