diff --git a/.github/workflows/percy.yml b/.github/workflows/percy.yml
index df56e6ed8..24343c2fc 100644
--- a/.github/workflows/percy.yml
+++ b/.github/workflows/percy.yml
@@ -10,7 +10,7 @@ jobs:
       - uses: actions/checkout@v6
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '4.0.3' # Not needed with a .ruby-version file
+          ruby-version: '4.0.4' # Not needed with a .ruby-version file
           bundler-cache: true # runs 'bundle install' and caches installed gems automatically
       - uses: actions/setup-node@v6
         with:
diff --git a/.github/workflows/weekly-run.yml b/.github/workflows/weekly-run.yml
index abeb4c9b3..ecf003da6 100644
--- a/.github/workflows/weekly-run.yml
+++ b/.github/workflows/weekly-run.yml
@@ -18,7 +18,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 4.0.3
+          ruby-version: 4.0.4
 
       - name: Install mechanize gem
         run: |
diff --git a/logorama/Gemfile b/logorama/Gemfile
index ff22d53e7..e6e6967c7 100644
--- a/logorama/Gemfile
+++ b/logorama/Gemfile
@@ -37,4 +37,4 @@ gem "tzinfo-data", platforms: %i[mingw mswin x64_mingw jruby]
 # Performance-booster for watching directories on Windows
 gem "wdm", "~> 0.2.0" if Gem.win_platform?
 
-ruby "4.0.3"
+ruby "4.0.4"
diff --git a/pdfstar/Gemfile b/pdfstar/Gemfile
index fe718faf6..8b32e3b26 100644
--- a/pdfstar/Gemfile
+++ b/pdfstar/Gemfile
@@ -5,4 +5,4 @@ source "https://rubygems.org"
 gem "mdl"
 gem "rubocop", require: false
 
-ruby "4.0.3"
+ruby "4.0.4"