diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 760d411157..47d50e3f05 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -55,13 +55,13 @@ jobs:
             version: '1.11'
             assertions: true
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: julia-actions/setup-julia@v2
         if: ${{ ! matrix.assertions }}
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         if: ${{ matrix.assertions }}
         with:
           repository: 'JuliaLang/julia'
@@ -139,7 +139,7 @@ jobs:
           - x64
         libEnzyme: [packaged]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
@@ -193,7 +193,7 @@ jobs:
           - x64
         libEnzyme: [packaged]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
@@ -244,7 +244,7 @@ jobs:
           - DynamicExpressions
           - Bijectors
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
@@ -260,7 +260,7 @@ jobs:
     name: Documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: julia-actions/setup-julia@v2
         with:
           version: '1'
diff --git a/.github/workflows/CompatHelper.yml b/.github/workflows/CompatHelper.yml
index aaeb8a60d4..67ef741b6a 100644
--- a/.github/workflows/CompatHelper.yml
+++ b/.github/workflows/CompatHelper.yml
@@ -9,7 +9,7 @@ jobs:
   CompatHelper:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Get Julia compatibility
         id: julia_compat
         # NOTE: this requires a julia compat lower-bound with minor version!
diff --git a/.github/workflows/Format.yml b/.github/workflows/Format.yml
index 32afbf310d..ca6cc6da83 100644
--- a/.github/workflows/Format.yml
+++ b/.github/workflows/Format.yml
@@ -16,7 +16,7 @@ jobs:
     if: github.event.pull_request.draft == false
     steps:
       - name: Check out repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: ${{github.event.pull_request.head.ref}}
           repository: ${{github.event.pull_request.head.repo.full_name}}
diff --git a/.github/workflows/PreviewCleanup.yml b/.github/workflows/PreviewCleanup.yml
index 94b9f70ade..7eb81a9440 100644
--- a/.github/workflows/PreviewCleanup.yml
+++ b/.github/workflows/PreviewCleanup.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout gh-pages branch
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: gh-pages
       - name: Delete preview and history + push changes
diff --git a/.github/workflows/benchmark_pr.yml b/.github/workflows/benchmark_pr.yml
index 5c8716a04f..b1ffbde91f 100644
--- a/.github/workflows/benchmark_pr.yml
+++ b/.github/workflows/benchmark_pr.yml
@@ -17,7 +17,7 @@ jobs:
         runs-on: ubuntu-latest
 
         steps:
-            - uses: actions/checkout@v4
+            - uses: actions/checkout@v5
             - uses: julia-actions/setup-julia@v2
               with:
                 version: "1"
diff --git a/.github/workflows/scripts_deploy.yml b/.github/workflows/scripts_deploy.yml
index 637df29e78..a0fe1824da 100644
--- a/.github/workflows/scripts_deploy.yml
+++ b/.github/workflows/scripts_deploy.yml
@@ -11,7 +11,7 @@ jobs:
   docs:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - uses: julia-actions/setup-julia@v2
         with: