diff --git a/docker/mockserv.Dockerfile b/docker/mockserv.Dockerfile
index e263cb1e234..73b79ef6369 100644
--- a/docker/mockserv.Dockerfile
+++ b/docker/mockserv.Dockerfile
@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM golang:1.20-alpine AS build-env
+FROM --platform=$BUILDPLATFORM golang:1.21-alpine AS build-env
 
 # Set working directory for the build
 WORKDIR /src