diff --git a/Dockerfile b/Dockerfile
index 59dc278..fa048b6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.2.2-slim
+FROM ruby:3.3.0-slim
 ENV MATCHERS_DIR="._actionshub_problem-matchers"
 ENV	MATCHER_FILE="${MATCHERS_DIR}/markdownlint.json"
 
diff --git a/action.yml b/action.yml
index 549d3f3..1903df2 100644
--- a/action.yml
+++ b/action.yml
@@ -14,4 +14,4 @@ outputs:
     description: "stdout from mdl"
 runs:
   using: "docker"
-  image: "docker://ghcr.io/actionshub/markdownlint:v3.1.4"
+  image: "docker://ghcr.io/actionshub/markdownlint:v3.1.5"