diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index bbcaedb8b0..2ecdad5b86 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -21,13 +21,13 @@ jobs:
       fail-fast: false
       matrix:
         os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
-        ruby-version: ['3.4']
+        ruby-version: ['4.0']
 
     name: Ruby ${{ matrix.ruby-version }} on ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
       - name: Set up Ruby
-        uses: ruby/setup-ruby@44511735964dcb71245e7e55f72539531f7bc0eb # v1.257.0
+        uses: ruby/setup-ruby@4c24fa5ec04b2e79eb40571b1cee2a0d2b705771 # v1.278.0
         with:
           ruby-version: ${{ matrix.ruby-version }}
       - name: Install dependencies
diff --git a/.github/workflows/rubocop.yml b/.github/workflows/rubocop.yml
index 864c187322..1f13b66bf3 100644
--- a/.github/workflows/rubocop.yml
+++ b/.github/workflows/rubocop.yml
@@ -24,12 +24,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: ['3.4']
+        ruby-version: ['4.0']
     name: Ruby ${{ matrix.ruby-version }}
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Set up Ruby
-        uses: ruby/setup-ruby@44511735964dcb71245e7e55f72539531f7bc0eb # v1.257.0
+        uses: ruby/setup-ruby@4c24fa5ec04b2e79eb40571b1cee2a0d2b705771 # v1.278.0
         with:
           ruby-version: ${{ matrix.ruby-version }}
       - name: Install dependencies
diff --git a/.github/workflows/test-ruby-head.yml b/.github/workflows/test-ruby-head.yml
index 2c6a0e43df..c3b34434c6 100644
--- a/.github/workflows/test-ruby-head.yml
+++ b/.github/workflows/test-ruby-head.yml
@@ -21,7 +21,7 @@ jobs:
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Set up Ruby
-        uses: ruby/setup-ruby@44511735964dcb71245e7e55f72539531f7bc0eb # v1.257.0
+        uses: ruby/setup-ruby@4c24fa5ec04b2e79eb40571b1cee2a0d2b705771 # v1.278.0
         with:
           ruby-version: ${{ matrix.ruby-version }}
       - name: Install addons
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 84f3d93484..3cb10ea5ac 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,12 +27,12 @@ jobs:
       fail-fast: false
       matrix:
         os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
-        ruby-version: ['3.4', '3.3', '3.2']
+        ruby-version: ['4.0', '3.4', '3.3', '3.2']
     name: Ruby ${{ matrix.ruby-version }} on ${{ matrix.os }}
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Set up Ruby
-        uses: ruby/setup-ruby@44511735964dcb71245e7e55f72539531f7bc0eb # v1.257.0
+        uses: ruby/setup-ruby@4c24fa5ec04b2e79eb40571b1cee2a0d2b705771 # v1.278.0
         with:
           ruby-version: ${{ matrix.ruby-version }}
       - name: Install addons
@@ -48,12 +48,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: ['3.4', '3.3', '3.2']
+        ruby-version: ['4.0', '3.4', '3.3', '3.2']
     name: Windows service (Ruby ${{ matrix.ruby-version }})
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Set up Ruby
-        uses: ruby/setup-ruby@44511735964dcb71245e7e55f72539531f7bc0eb # v1.257.0
+        uses: ruby/setup-ruby@4c24fa5ec04b2e79eb40571b1cee2a0d2b705771 # v1.278.0
         with:
           ruby-version: ${{ matrix.ruby-version }}
       - name: Install dependencies