diff --git a/.ruby-version b/.ruby-version
index 47b322c..4d9d11c 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.4.1
+3.4.2
diff --git a/Dockerfile b/Dockerfile
index e261a9e..826ff47 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.4.1-alpine AS builder
+FROM ruby:3.4.2-alpine AS builder
 RUN apk add --no-cache build-base
 
 WORKDIR /forecast-collector
@@ -8,7 +8,7 @@ RUN bundle config --local frozen 1 && \
     bundle install -j4 --retry 3 && \
     bundle clean --force
 
-FROM ruby:3.4.1-alpine
+FROM ruby:3.4.2-alpine
 LABEL maintainer="georg@ledermann.dev"
 
 # Add tzdata to get correct timezone