diff --git a/.ruby-version b/.ruby-version
index 4d9d11cf50..6cb9d3dd0d 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.4.2
+3.4.3
diff --git a/.tool-versions b/.tool-versions
index ae5ecdb2b3..a72ead61f3 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-ruby 3.4.2
+ruby 3.4.3
diff --git a/Dockerfile b/Dockerfile
index 92c5964260..5a85b1e4eb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.4.2
+FROM ruby:3.4.3
 ENV LANG=C.UTF-8
 ENV ENABLE_SERVICE_WORKER=true
 
diff --git a/Dockerfile-alpine b/Dockerfile-alpine
index ce605eaab9..7075f4c508 100644
--- a/Dockerfile-alpine
+++ b/Dockerfile-alpine
@@ -1,4 +1,4 @@
-FROM ruby:3.4.2-alpine
+FROM ruby:3.4.3-alpine
 
 ENV LANG=C.UTF-8
 ENV ENABLE_SERVICE_WORKER=true
diff --git a/Gemfile b/Gemfile
index be8dcb0b6c..21c75e07a3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
-ruby '3.4.2'
+ruby '3.4.3'
 
 gem 'activesupport', require: false
 gem 'html-pipeline'
diff --git a/Gemfile.lock b/Gemfile.lock
index ffeaa732e3..bf4189c3c2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -191,7 +191,7 @@ DEPENDENCIES
   yajl-ruby
 
 RUBY VERSION
-   ruby 3.4.2p28
+   ruby 3.4.3p32
 
 BUNDLED WITH
    2.4.6