diff --git a/cmd/testdata/testsvc/Dockerfile b/cmd/testdata/testsvc/Dockerfile
index 450b116e..3a736488 100644
--- a/cmd/testdata/testsvc/Dockerfile
+++ b/cmd/testdata/testsvc/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.21rc3-alpine AS builder
+FROM golang:1.21.8-alpine AS builder
 
 ENV GO111MODULE=on
 ARG user