diff --git a/Dockerfile b/Dockerfile
index bc3dcdbb..5cf690d8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # build environment ###########################################
-FROM golang:1.20.7-alpine@sha256:11e8b9326ee23669edc53e32209a8ba12120fb331086eed6227baa4ce314d369 AS build-env
+FROM golang:1.21.0-alpine@sha256:445f34008a77b0b98bf1821bf7ef5e37bb63cc42d22ee7c21cc17041070d134f AS build-env
 
 WORKDIR /app