diff --git a/deployment/Dockerfile b/deployment/Dockerfile
index 37db31f..1b5ee6b 100644
--- a/deployment/Dockerfile
+++ b/deployment/Dockerfile
@@ -1,5 +1,5 @@
 # build environment ###########################################
-FROM golang:1.18.1-alpine@sha256:42d35674864fbb577594b60b84ddfba1be52b4d4298c961b46ba95e9fb4712e8 AS build-env
+FROM golang:1.21.6-alpine@sha256:a6a7f1fcf12f5efa9e04b1e75020931a616cd707f14f62ab5262bfbe109aa84a AS build-env
 
 WORKDIR /app