diff --git a/Dockerfile b/Dockerfile
index 9dc336c..6a000c9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/library/alpine:3.12
+FROM docker.io/library/alpine:3.15
 
 ARG NODEJS_VERSION=12.22.6-r0
 ARG MARKDOWNLINT_VERSION
diff --git a/Makefile b/Makefile
index fb77cc6..0c01d91 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 # MARKDOWNLINT_VERSION
 # Only required to install a specifiy version
-MARKDOWNLINT_VERSION?=v0.30.0 # renovate: datasource=npm depName=markdownlint-cli
+MARKDOWNLINT_VERSION?=v0.29.0 # renovate: datasource=npm depName=markdownlint-cli
 
 # CONTAINER_RUNTIME
 # The CONTAINER_RUNTIME variable will be used to specified the path to a