diff --git a/.github/workflows/pr-code.yml b/.github/workflows/pr-code.yml
index 73415a1..b353055 100644
--- a/.github/workflows/pr-code.yml
+++ b/.github/workflows/pr-code.yml
@@ -13,7 +13,7 @@ permissions:
 env:
   VERSION_KIND: v0.20.0
   VERSION_GOLANGCILINT: latest
-  VERSION_GOLANG: '1.21.5'
+  VERSION_GOLANG: '1.21.6'
 
 jobs:
   static-analysis:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 1d97a30..edaae77 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,7 +12,7 @@ env:
   COMMIT_EMAIL: monkeynator@enix.io
   VERSION_KIND: v0.20.0
   VERSION_GOLANGCILINT: latest
-  VERSION_GOLANG: '1.21.5'
+  VERSION_GOLANG: '1.21.6'
   VERSION_CHARTRELEASER: '1.6.0'
   VERSION_OCI_BUSYBOX: '1.36.1-uclibc'
   VERSION_OCI_ALPINE: '3.19.1'
diff --git a/Dockerfile b/Dockerfile
index f161fe8..f076e2b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 
 # https://github.com/hadolint/hadolint/issues/861
 # hadolint ignore=DL3029
-FROM --platform=${BUILDPLATFORM:-linux/amd64} golang:1.21.5-alpine as build
+FROM --platform=${BUILDPLATFORM:-linux/amd64} golang:1.21.6-alpine as build
 
 WORKDIR $GOPATH/src/github.com/enix/x509-certificate-exporter