diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index dc29c684..e8659360 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -1,3 +1,3 @@
 # Make sure RUBY_VERSION matches the Ruby version in .ruby-version
-ARG RUBY_VERSION=3.2.9@sha256:cb60d6c68fca2cd3e25d82cf7e31268ab490f40f85a4216bf4de617d043efac4
+ARG RUBY_VERSION=3.4.7@sha256:f95fe9897f68fdf2991462136a7922b88b7b756b20b5b0692183f2766281bb46
 FROM ghcr.io/rails/devcontainer/images/ruby:$RUBY_VERSION