diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 7dca708..5844fe4 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -55,7 +55,7 @@ jobs:
         # your codebase is analyzed, see https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 59a3ea3..62c2ed7 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -15,7 +15,7 @@ jobs:
     outputs:
       prepared: ${{ steps.validate.outputs.prepared }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Validate commit message
         id: validate
@@ -51,7 +51,7 @@ jobs:
         app-id: ${{ vars.PYPSA_BOT_ID }}
         private-key: ${{ secrets.PYPSA_BOT_PRIVATE_KEY }}
 
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0
 
@@ -61,7 +61,7 @@ jobs:
         echo "Branch found: $branch"
         echo "BRANCH_NAME=$branch" >> $GITHUB_ENV
 
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0
         ref: ${{ env.BRANCH_NAME }}
@@ -128,7 +128,7 @@ jobs:
     if: ${{ needs.check-preparation.outputs.prepared == 'true' }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: hynek/build-and-inspect-python-package@v2
         with:
           upload-name-suffix: "-release"
@@ -138,7 +138,7 @@ jobs:
     needs: [build]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: softprops/action-gh-release@v3
         with:
           body: |
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index bb9f95d..dd81bb0 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,7 +20,7 @@ jobs:
     name: Build and verify package
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0 # Needed for setuptools_scm
       - uses: hynek/build-and-inspect-python-package@v2
@@ -44,7 +44,7 @@ jobs:
         - windows-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0 # Needed for setuptools_scm
 
diff --git a/.github/workflows/type-checking.yml b/.github/workflows/type-checking.yml
index a740f6d..089dfe5 100644
--- a/.github/workflows/type-checking.yml
+++ b/.github/workflows/type-checking.yml
@@ -10,7 +10,7 @@ jobs:
   mypy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0