diff --git a/.github/workflows/ci-tests.yml b/.github/workflows/ci-tests.yml
index dd94a13b4..54976173d 100644
--- a/.github/workflows/ci-tests.yml
+++ b/.github/workflows/ci-tests.yml
@@ -214,7 +214,7 @@ jobs:
           CWLTOOL_OPTIONS: ${{ matrix.cwl-version == 'v1.2' && '--relax-path-checks' || '' }} ${{ matrix.extras }}
         run: ./conformance-test.sh
       - name: Archive test results
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: cwl-${{ matrix.cwl-version }}-${{ matrix.container }}${{ matrix.extras }}-conformance-results
           path: |
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index e5bddc8d2..2b0c42ccd 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -54,7 +54,7 @@ jobs:
           # Linux arm64 wheels are built on circleci
           CIBW_ARCHS_LINUX: auto64 # ppc64le s390x
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: artifact-${{ matrix.image }}
           path: ./wheelhouse/*.whl
@@ -76,7 +76,7 @@ jobs:
       - name: Build sdist
         run: pipx run build --sdist
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: artifact-source
           path: dist/*.tar.gz
@@ -102,7 +102,7 @@ jobs:
       - name: Build wheels
         uses: pypa/cibuildwheel@v3.2
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: artifact-${{ matrix.os }}-${{ strategy.job-index }}
           path: ./wheelhouse/*.whl