diff --git a/.github/workflows/integration-tests-on-emulator.yml b/.github/workflows/integration-tests-on-emulator.yml
index 3e4166d2..4c49bbfb 100644
--- a/.github/workflows/integration-tests-on-emulator.yml
+++ b/.github/workflows/integration-tests-on-emulator.yml
@@ -46,7 +46,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.4.7'
+          ruby-version: '4.0.1'
           working-directory: spannerlib/wrappers/spannerlib-ruby
           bundler-cache: true
       - name: Compile and Run Ruby Integration Tests
diff --git a/.github/workflows/release-ruby-wrapper.yml b/.github/workflows/release-ruby-wrapper.yml
index 88215534..0ca4a9a7 100644
--- a/.github/workflows/release-ruby-wrapper.yml
+++ b/.github/workflows/release-ruby-wrapper.yml
@@ -42,7 +42,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.4.7'
+          ruby-version: '4.0.1'
           bundler-cache: true
           working-directory: 'spannerlib/wrappers/spannerlib-ruby'
 
@@ -95,7 +95,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.4.7'
+          ruby-version: '4.0.1'
           bundler-cache: true
           working-directory: 'spannerlib/wrappers/spannerlib-ruby'
 
diff --git a/.github/workflows/ruby-wrapper-lint.yml b/.github/workflows/ruby-wrapper-lint.yml
index b409fde2..b7382dd2 100644
--- a/.github/workflows/ruby-wrapper-lint.yml
+++ b/.github/workflows/ruby-wrapper-lint.yml
@@ -23,7 +23,7 @@ jobs:
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.4.7'       
+          ruby-version: '4.0.1'       
           bundler-cache: true 
           working-directory: spannerlib/wrappers/spannerlib-ruby 
 
diff --git a/spannerlib/wrappers/spannerlib-ruby/Gemfile b/spannerlib/wrappers/spannerlib-ruby/Gemfile
index d26eff81..e623dad4 100644
--- a/spannerlib/wrappers/spannerlib-ruby/Gemfile
+++ b/spannerlib/wrappers/spannerlib-ruby/Gemfile
@@ -7,7 +7,7 @@ gemspec
 gem "rake", "~> 13.0"
 
 group :development, :test do
-  gem "minitest", "~> 5.0"
+  gem "minitest", "~> 6.0"
   gem "rake-compiler", "~> 1.0"
   gem "rspec", "~> 3.0"
   gem "rubocop", require: false