diff --git a/postorius/Dockerfile b/postorius/Dockerfile
index f698050..d44a78c 100644
--- a/postorius/Dockerfile
+++ b/postorius/Dockerfile
@@ -1,5 +1,5 @@
 # syntax = docker/dockerfile:1.3
-FROM alpine:3.17.3
+FROM alpine:3.18.0
 
 # Add needed files for uwsgi server + settings for django
 COPY mailman-web /opt/mailman-web
diff --git a/postorius/Dockerfile.dev b/postorius/Dockerfile.dev
index d79f477..815e706 100644
--- a/postorius/Dockerfile.dev
+++ b/postorius/Dockerfile.dev
@@ -1,5 +1,5 @@
 # syntax = docker/dockerfile:1.3
-FROM alpine:3.17.3
+FROM alpine:3.18.0
 
 # Add needed files for uwsgi server + settings for django
 COPY mailman-web /opt/mailman-web