diff --git a/.ruby-version b/.ruby-version
index 2aa5131..7bcbb38 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.4.7
+3.4.9
diff --git a/Dockerfile b/Dockerfile
index ae91214..a79aa1d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3.4.7-alpine3.22 AS base
+FROM ruby:3.4.9-alpine3.22 AS base
 
 ENV APP_HOME=/app
 ENV LANG=C.UTF-8
@@ -10,7 +10,7 @@ FROM base AS builder
 RUN apk add --update --no-cache build-base git yaml-dev
 
 WORKDIR $APP_HOME
-COPY Gemfile* /app/
+COPY .ruby-version Gemfile* /app/
 
 RUN bundle install && \
     rm -rf /usr/local/bundle/*/*/cache && \
diff --git a/Gemfile b/Gemfile
index a76a62b..a20673f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-ruby "3.4.7"
+ruby file: ".ruby-version"
 source "https://rubygems.org"
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 7c3875b..75290f7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -236,7 +236,7 @@ DEPENDENCIES
   webmock
 
 RUBY VERSION
-   ruby 3.4.7p58
+   ruby 3.4.9p82
 
 BUNDLED WITH
    2.7.2