diff --git a/backend/src/apiserver/main.go b/backend/src/apiserver/main.go
index c75ad6a51d8..3f110ebf303 100644
--- a/backend/src/apiserver/main.go
+++ b/backend/src/apiserver/main.go
@@ -112,7 +112,7 @@ func main() {
 }
 
 // A custom http request header matcher to pass on the user identity
-// Reference: https://github.com/grpc-ecosystem/grpc-gateway/blob/master/docs/_docs/customizingyourgateway.md#mapping-from-http-request-headers-to-grpc-client-metadata
+// Reference: https://github.com/grpc-ecosystem/grpc-gateway/blob/v1.16.0/docs/_docs/customizingyourgateway.md#mapping-from-http-request-headers-to-grpc-client-metadata
 func grpcCustomMatcher(key string) (string, bool) {
 	if strings.EqualFold(key, common.GetKubeflowUserIDHeader()) {
 		return strings.ToLower(key), true