diff --git a/.github/workflows/ci-locks.yml b/.github/workflows/ci-locks.yml
index 92fb6d84..058d5df9 100644
--- a/.github/workflows/ci-locks.yml
+++ b/.github/workflows/ci-locks.yml
@@ -92,7 +92,7 @@ jobs:
         tox -e ${{ matrix.lock }} -- --platform osx-64 --platform win-64
 
     - name: "Upload lock artifacts"
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: lock-artifacts
         path: ${{ github.workspace }}/requirements/locks/${{ matrix.lock }}*.txt
@@ -107,7 +107,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: "Download lock artifacts"
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4
       with:
         name: lock-artifacts
         path: ${{ github.workspace }}/requirements/locks
diff --git a/.github/workflows/ci-wheels.yml b/.github/workflows/ci-wheels.yml
index cef745d8..78c72c8a 100644
--- a/.github/workflows/ci-wheels.yml
+++ b/.github/workflows/ci-wheels.yml
@@ -72,7 +72,7 @@ jobs:
         UDUNITS2_XML_PATH: ${{ matrix.xml_path }}
         CIBW_ENVIRONMENT_PASS_LINUX: UDUNITS2_INCDIR UDUNITS2_LIBDIR UDUNITS2_XML_PATH
 
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: pypi-artifacts
         path: ${{ github.workspace }}/wheelhouse/*.whl
@@ -91,7 +91,7 @@ jobs:
       run: |
         pipx run build --sdist 
 
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: pypi-artifacts
         path: ${{ github.workspace }}/dist/*.tar.gz
@@ -102,7 +102,7 @@ jobs:
     name: "Show artifacts"
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: pypi-artifacts
         path: ${{ github.workspace }}/dist
@@ -119,7 +119,7 @@ jobs:
     # upload to Test PyPI for every commit on main branch
     if: github.event_name == 'push' && github.event.ref == 'refs/heads/main'
     steps:
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: pypi-artifacts
         path: ${{ github.workspace }}/dist
@@ -140,7 +140,7 @@ jobs:
     # upload to PyPI for every tag starting with 'v'
     if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags/v')
     steps:
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: pypi-artifacts
         path: ${{ github.workspace }}/dist