diff --git a/.ruby-version b/.ruby-version
index a07bf72..753ec9c 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-ruby-3.4.2
+ruby-3.4.3
diff --git a/Dockerfile b/Dockerfile
index e15f2f4..56042e5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # syntax = docker/dockerfile:1
 
 # Make sure RUBY_VERSION matches the Ruby version in .ruby-version and Gemfile
-ARG RUBY_VERSION=3.4.2
+ARG RUBY_VERSION=3.4.3
 FROM registry.docker.com/library/ruby:$RUBY_VERSION-slim AS base
 
 # Rails app lives here
diff --git a/Dockerfile.dev b/Dockerfile.dev
index a13a506..f2a82ba 100644
--- a/Dockerfile.dev
+++ b/Dockerfile.dev
@@ -1,7 +1,7 @@
 # syntax = docker/dockerfile:1
 
 # Make sure RUBY_VERSION matches the Ruby version in .ruby-version and Gemfile
-ARG RUBY_VERSION=3.4.2
+ARG RUBY_VERSION=3.4.3
 FROM registry.docker.com/library/ruby:$RUBY_VERSION-slim as base
 
 # Rails app lives here