diff --git a/.github/workflows/baseruby.yml b/.github/workflows/baseruby.yml
index 27245b6bbfd5bc..ceaf03bd7d39ef 100644
--- a/.github/workflows/baseruby.yml
+++ b/.github/workflows/baseruby.yml
@@ -35,7 +35,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: .downloaded-cache
           key: downloaded-cache
diff --git a/.github/workflows/bundled_gems.yml b/.github/workflows/bundled_gems.yml
index eba1c2ad6dead7..c0cb7e1b02df1c 100644
--- a/.github/workflows/bundled_gems.yml
+++ b/.github/workflows/bundled_gems.yml
@@ -30,7 +30,7 @@ jobs:
 
       - uses: actions/checkout@v4
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: .downloaded-cache
           key: downloaded-cache-${{ github.sha }}
diff --git a/.github/workflows/check_dependencies.yml b/.github/workflows/check_dependencies.yml
index 10ee1b0871b04b..d97385215a4d32 100644
--- a/.github/workflows/check_dependencies.yml
+++ b/.github/workflows/check_dependencies.yml
@@ -40,7 +40,7 @@ jobs:
           git config --global advice.detachedHead 0
           git config --global init.defaultBranch garbage
       - uses: actions/checkout@v4
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: .downloaded-cache
           key: downloaded-cache
diff --git a/.github/workflows/check_misc.yml b/.github/workflows/check_misc.yml
index f5cc1a2340bd59..8fcd2b28071f2d 100644
--- a/.github/workflows/check_misc.yml
+++ b/.github/workflows/check_misc.yml
@@ -23,7 +23,7 @@ jobs:
           done | grep -F .
         working-directory: include
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: .downloaded-cache
           key: downloaded-cache-${{ github.sha }}
diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index bcee13a91d93e0..a8bf0021cd60aa 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -38,7 +38,7 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v4
 
-    - uses: actions/cache@v4
+    - uses: actions/cache@v5
       with:
         path: .downloaded-cache
         key: downloaded-cache
diff --git a/.github/workflows/compilers.yml b/.github/workflows/compilers.yml
index 5b5be06abea556..5d3c93db511c99 100644
--- a/.github/workflows/compilers.yml
+++ b/.github/workflows/compilers.yml
@@ -227,7 +227,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: src/.downloaded-cache
           key: downloaded-cache
diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 93ec9684693017..0c2d565b120489 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -38,7 +38,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: src/.downloaded-cache
           key: downloaded-cache
diff --git a/.github/workflows/mingw.yml b/.github/workflows/mingw.yml
index 61142e9497a457..43971cdfd95e89 100644
--- a/.github/workflows/mingw.yml
+++ b/.github/workflows/mingw.yml
@@ -57,7 +57,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: src/.downloaded-cache
           key: downloaded-cache
diff --git a/.github/workflows/mjit.yml b/.github/workflows/mjit.yml
index f4d0aa171ef5f0..357f11c03003b9 100644
--- a/.github/workflows/mjit.yml
+++ b/.github/workflows/mjit.yml
@@ -43,7 +43,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: src/.downloaded-cache
           key: downloaded-cache
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index 6c1ab4ace75998..e815c022572a01 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -69,7 +69,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: src/.downloaded-cache
           key: downloaded-cache
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 759f0b784f09a1..b3e0d38666a62b 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -44,14 +44,14 @@ jobs:
         shell: msys2 {0}
         run: echo PATCH=$(cygpath -wa $(command -v patch)) >> $GITHUB_ENV
         if: ${{ steps.setup-msys2.outcome == 'success' }}
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: C:\vcpkg\downloads
           key: ${{ runner.os }}-vcpkg-download-${{ env.OS_VER }}-${{ github.sha }}
           restore-keys: |
             ${{ runner.os }}-vcpkg-download-${{ env.OS_VER }}-
             ${{ runner.os }}-vcpkg-download-
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: C:\vcpkg\installed
           key: ${{ runner.os }}-vcpkg-installed-${{ matrix.os }}-${{ github.sha }}
@@ -61,7 +61,7 @@ jobs:
       - name: Install libraries with vcpkg
         run: |
           vcpkg --triplet x64-windows install libffi libyaml openssl readline zlib
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: C:\Users\runneradmin\AppData\Local\Temp\chocolatey
           key: ${{ runner.os }}-chocolatey-${{ env.OS_VER }}-${{ github.sha }}
@@ -83,7 +83,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: src/.downloaded-cache
           key: downloaded-cache
diff --git a/.github/workflows/yjit-ubuntu.yml b/.github/workflows/yjit-ubuntu.yml
index 96d079c33a9151..f00e682b4ee599 100644
--- a/.github/workflows/yjit-ubuntu.yml
+++ b/.github/workflows/yjit-ubuntu.yml
@@ -81,7 +81,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           path: src
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         with:
           path: src/.downloaded-cache
           key: downloaded-cache