diff --git a/contrib/golang/router/cluster_specifier/test/test_data/simple/go.mod b/contrib/golang/router/cluster_specifier/test/test_data/simple/go.mod
index fb46eb979a6da..21d45eb369785 100644
--- a/contrib/golang/router/cluster_specifier/test/test_data/simple/go.mod
+++ b/contrib/golang/router/cluster_specifier/test/test_data/simple/go.mod
@@ -5,7 +5,7 @@ go 1.24.6
 require (
 	github.com/cncf/xds/go v0.0.0-20251110193048-8bfbf64dc13e
 	github.com/envoyproxy/envoy v1.36.2
-	google.golang.org/protobuf v1.36.10
+	google.golang.org/protobuf v1.36.11
 )
 
 require (