diff --git a/.github/workflows/build-and-deploy.yml b/.github/workflows/build-and-deploy.yml
index a99a74299..5553613d9 100644
--- a/.github/workflows/build-and-deploy.yml
+++ b/.github/workflows/build-and-deploy.yml
@@ -17,7 +17,7 @@ jobs:
     env:
       image: ghcr.io/opensafely-core/ehrql
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           # Required to get previous tags
           fetch-depth: 0
diff --git a/.github/workflows/check-docs.yml b/.github/workflows/check-docs.yml
index 9c2447c97..af5935ced 100644
--- a/.github/workflows/check-docs.yml
+++ b/.github/workflows/check-docs.yml
@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - uses: opensafely-core/setup-action@v1
         with:
           install-just: true
diff --git a/.github/workflows/generative-tests.yml b/.github/workflows/generative-tests.yml
index 0dd5b171e..605de65c7 100644
--- a/.github/workflows/generative-tests.yml
+++ b/.github/workflows/generative-tests.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: opensafely-core/setup-action@v1
         with:
           install-just: true
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c5dcc5ec3..6f1376866 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: opensafely-core/setup-action@v1
         with:
           install-just: true
@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: opensafely-core/setup-action@v1
         with:
           install-just: true
@@ -53,7 +53,7 @@ jobs:
     outputs:
       tag: ${{ steps.tag.outputs.new_version }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
       - name: Bump version and push tag
diff --git a/.github/workflows/pages-deployment.yml b/.github/workflows/pages-deployment.yml
index 66ebf80cb..c55e05648 100644
--- a/.github/workflows/pages-deployment.yml
+++ b/.github/workflows/pages-deployment.yml
@@ -12,7 +12,7 @@ jobs:
     name: Deploy to Cloudflare Pages
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           submodules: true
 
diff --git a/.github/workflows/update-dependencies.yml b/.github/workflows/update-dependencies.yml
index 50c1fefad..ee738e06e 100644
--- a/.github/workflows/update-dependencies.yml
+++ b/.github/workflows/update-dependencies.yml
@@ -9,7 +9,7 @@ jobs:
   update-dependencies:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
     - uses: "opensafely-core/setup-action@v1"
       with:
         python-version: "3.11"
diff --git a/.github/workflows/update-external-studies.yml b/.github/workflows/update-external-studies.yml
index 5569fd3fa..1a9160985 100644
--- a/.github/workflows/update-external-studies.yml
+++ b/.github/workflows/update-external-studies.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: opensafely-core/setup-action@v1
         with:
           install-just: true
diff --git a/.github/workflows/update-pledge.yml b/.github/workflows/update-pledge.yml
index 47884b0e4..a55288d75 100644
--- a/.github/workflows/update-pledge.yml
+++ b/.github/workflows/update-pledge.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: opensafely-core/setup-action@v1
         with:
           install-just: true
diff --git a/.github/workflows/update-tpp-schema.yml b/.github/workflows/update-tpp-schema.yml
index 520f4a5a4..a477945b5 100644
--- a/.github/workflows/update-tpp-schema.yml
+++ b/.github/workflows/update-tpp-schema.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: opensafely-core/setup-action@v1
         with:
           install-just: true