diff --git a/Dockerfile b/Dockerfile
index 196966bb..56b9ba3a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -20,7 +20,7 @@ FROM hashicorp/terraform:1.3.1 as terraform
 FROM koalaman/shellcheck:v0.8.0 as shellcheck
 FROM mstruebing/editorconfig-checker:2.4.0 as editorconfig-checker
 FROM mvdan/shfmt:v3.5.1 as shfmt
-FROM rhysd/actionlint:1.6.20 as actionlint
+FROM rhysd/actionlint:1.6.21 as actionlint
 FROM scalameta/scalafmt:v3.5.9 as scalafmt
 FROM yoheimuta/protolint:0.41.0 as protolint
 FROM zricethezav/gitleaks:v8.13.0 as gitleaks