diff --git a/.github/workflows/baseruby.yml b/.github/workflows/baseruby.yml
index 7385fc4d9e31a6..aa46dd1640713a 100644
--- a/.github/workflows/baseruby.yml
+++ b/.github/workflows/baseruby.yml
@@ -34,7 +34,7 @@ jobs:
           - ruby-3.1
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/cache@v3
         with:
           path: .downloaded-cache
diff --git a/.github/workflows/bundled_gems.yml b/.github/workflows/bundled_gems.yml
index 83f01d58682b11..f69ba607601e22 100644
--- a/.github/workflows/bundled_gems.yml
+++ b/.github/workflows/bundled_gems.yml
@@ -28,7 +28,7 @@ jobs:
           echo "GNUMAKEFLAGS=-j$((1 + $(nproc --all)))" >> $GITHUB_ENV
           echo "TODAY=$(date +%F)" >> $GITHUB_ENV
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/cache@v3
         with:
diff --git a/.github/workflows/check_dependencies.yml b/.github/workflows/check_dependencies.yml
index f606a86b66eb51..95305238072913 100644
--- a/.github/workflows/check_dependencies.yml
+++ b/.github/workflows/check_dependencies.yml
@@ -39,7 +39,7 @@ jobs:
         run: |
           git config --global advice.detachedHead 0
           git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/cache@v3
         with:
           path: .downloaded-cache
diff --git a/.github/workflows/check_misc.yml b/.github/workflows/check_misc.yml
index 9e35d7f432414d..b3c5557010159b 100644
--- a/.github/workflows/check_misc.yml
+++ b/.github/workflows/check_misc.yml
@@ -9,7 +9,7 @@ jobs:
   checks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Check if C-sources are US-ASCII
         run: |
           ! grep -r -n '[^	 -~]' *.[chy] include internal win32/*.[ch]
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 70fd22a7a088f9..3c4e48e5cda1a2 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -36,7 +36,7 @@ jobs:
         sudo apt-get install --no-install-recommends -q -y build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev bison autoconf ruby
 
     - name: Checkout repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - uses: actions/cache@v3
       with:
diff --git a/.github/workflows/compilers.yml b/.github/workflows/compilers.yml
index 3bd299640d24d2..2dc6ce6fb84373 100644
--- a/.github/workflows/compilers.yml
+++ b/.github/workflows/compilers.yml
@@ -201,7 +201,7 @@ jobs:
         run: |
           echo "${{ matrix.entry.key }}=${{ matrix.entry.value }}" >> $GITHUB_ENV
           echo "GNUMAKEFLAGS=-sj$((1 + $(nproc --all)))" >> $GITHUB_ENV
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           path: src
       - uses: actions/cache@v3
diff --git a/.github/workflows/mingw.yml b/.github/workflows/mingw.yml
index 8e3aec6e6f8a4f..674e55adaad442 100644
--- a/.github/workflows/mingw.yml
+++ b/.github/workflows/mingw.yml
@@ -52,7 +52,7 @@ jobs:
           git config --global core.eol lf
           git config --global advice.detachedHead 0
           git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           path: src
       - uses: actions/cache@v3
diff --git a/.github/workflows/mjit.yml b/.github/workflows/mjit.yml
index d5d9cecc564cf1..fe585fb38cc273 100644
--- a/.github/workflows/mjit.yml
+++ b/.github/workflows/mjit.yml
@@ -40,7 +40,7 @@ jobs:
         run: |
           git config --global advice.detachedHead 0
           git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           path: src
       - uses: actions/cache@v3
diff --git a/.github/workflows/spec_guards.yml b/.github/workflows/spec_guards.yml
index 18e2d3c1a87aff..60bb6211552ea5 100644
--- a/.github/workflows/spec_guards.yml
+++ b/.github/workflows/spec_guards.yml
@@ -30,7 +30,7 @@ jobs:
           - ruby-3.1
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index b7097cca530e40..241aef12d52971 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -65,7 +65,7 @@ jobs:
         run: |
           git config --global advice.detachedHead 0
           git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           path: src
       - uses: actions/cache@v3
diff --git a/.github/workflows/wasm.yml b/.github/workflows/wasm.yml
index db00db9009c076..cdca2fa8b5d0f7 100644
--- a/.github/workflows/wasm.yml
+++ b/.github/workflows/wasm.yml
@@ -46,7 +46,7 @@ jobs:
         run: |
           git config --global advice.detachedHead 0
           git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           path: src
       - name: Install libraries
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 9c9d7b9da09d2f..a76a00d58a39e2 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -80,7 +80,7 @@ jobs:
           git config --global core.eol lf
           git config --global advice.detachedHead 0
           git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           path: src
       - uses: actions/cache@v3
diff --git a/.github/workflows/yjit-ubuntu.yml b/.github/workflows/yjit-ubuntu.yml
index beec059e0c610a..c3157b063ce3a1 100644
--- a/.github/workflows/yjit-ubuntu.yml
+++ b/.github/workflows/yjit-ubuntu.yml
@@ -56,7 +56,7 @@ jobs:
         run: |
           git config --global advice.detachedHead 0
           git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           path: src
       - uses: actions/cache@v3
diff --git a/.github/workflows/yjit_asm_tests.yml b/.github/workflows/yjit_asm_tests.yml
index a7e05066dd83c7..25774f3430fd6f 100644
--- a/.github/workflows/yjit_asm_tests.yml
+++ b/.github/workflows/yjit_asm_tests.yml
@@ -30,7 +30,7 @@ jobs:
         run: |
           git config --global advice.detachedHead 0
           git config --global init.defaultBranch garbage
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           path: src
       - name: Run ASM tests