diff --git a/.github/workflows/benchmark-smoke.yml b/.github/workflows/benchmark-smoke.yml
index 3b9b4480d..96e75ae1b 100644
--- a/.github/workflows/benchmark-smoke.yml
+++ b/.github/workflows/benchmark-smoke.yml
@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0  # setuptools_scm
 
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index 49a03d15b..95cfc2a3b 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -31,7 +31,7 @@ jobs:
       id-token: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 7c066b733..44a120caf 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/codspeed.yml b/.github/workflows/codspeed.yml
index f5b8a2074..a70170d18 100644
--- a/.github/workflows/codspeed.yml
+++ b/.github/workflows/codspeed.yml
@@ -26,7 +26,7 @@ jobs:
       contents: read   # actions/checkout
       id-token: write  # OIDC auth with CodSpeed — no token secret
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0  # setuptools_scm
     - name: Set up Python 3.13
@@ -57,7 +57,7 @@ jobs:
       contents: read
       id-token: write
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0  # setuptools_scm
     - name: Set up Python 3.13
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index aeebcfc7d..573293a63 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -11,7 +11,7 @@ jobs:
     name: Build and verify package
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: hynek/build-and-inspect-python-package@v2
 
   release:
@@ -20,7 +20,7 @@ jobs:
     needs: [build]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
       - uses: softprops/action-gh-release@v3
         with:
           generate_release_notes: true
diff --git a/.github/workflows/test-models.yml b/.github/workflows/test-models.yml
index 77d0e1c06..82d26568e 100644
--- a/.github/workflows/test-models.yml
+++ b/.github/workflows/test-models.yml
@@ -30,7 +30,7 @@ jobs:
         shell: bash -l {0}
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           repository: PyPSA/pypsa-eur
           ref: master
diff --git a/.github/workflows/test-notebooks.yml b/.github/workflows/test-notebooks.yml
index dfe025d2e..9c9fdcd06 100644
--- a/.github/workflows/test-notebooks.yml
+++ b/.github/workflows/test-notebooks.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9cfa3991c..7ae92b4c1 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -18,7 +18,7 @@ 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
@@ -42,7 +42,7 @@ jobs:
         - windows-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0 # Needed for setuptools_scm
 
@@ -92,7 +92,7 @@ jobs:
 
     - name: Upload code coverage report
       if: matrix.os == 'ubuntu-latest'
-      uses: codecov/codecov-action@v6
+      uses: codecov/codecov-action@v7
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
 
@@ -102,7 +102,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v7
       with:
         fetch-depth: 0 # Needed for setuptools_scm