diff --git a/.woodpecker.yml b/.woodpecker.yml
index 05dbdc3..5be415c 100644
--- a/.woodpecker.yml
+++ b/.woodpecker.yml
@@ -1,5 +1,5 @@
 variables:
-    - &golang 'golang:1.20'
+    - &golang 'golang:1.21'
     - &build_plugin 'woodpeckerci/plugin-docker-buildx:2'
     - base_settings: &base_buildx_settings
         platforms: 'linux/amd64,linux/arm64'
diff --git a/Dockerfile.multiarch b/Dockerfile.multiarch
index a73cb13..3044700 100644
--- a/Dockerfile.multiarch
+++ b/Dockerfile.multiarch
@@ -1,6 +1,6 @@
 ARG BUILDX_VERSION=0.11.0
 ARG DOCKER_VERSION=20.10-dind
-ARG GOLANG_VERSION=1.20
+ARG GOLANG_VERSION=1.21@sha256:24a09375a6216764a3eda6a25490a88ac178b5fcb9511d59d0da5ebf9e496474
 
 FROM --platform=$BUILDPLATFORM golang:${GOLANG_VERSION} as build