diff --git a/.github/workflows/docs-preview.yml b/.github/workflows/docs-preview.yml
index abc24bda..e293d121 100644
--- a/.github/workflows/docs-preview.yml
+++ b/.github/workflows/docs-preview.yml
@@ -118,7 +118,7 @@ jobs:
           echo "✅ Documentation preview built successfully"
 
       - name: Upload documentation artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: docs-preview-pr-${{ github.event.pull_request.number }}
           path: docs/_build/html/
diff --git a/.github/workflows/lambda-tests.yml b/.github/workflows/lambda-tests.yml
index 0e7c28a2..fcc27c82 100644
--- a/.github/workflows/lambda-tests.yml
+++ b/.github/workflows/lambda-tests.yml
@@ -113,7 +113,7 @@ jobs:
 
       - name: Upload Lambda test results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: lambda-docker-test-results
           path: tests/lambda/test-results/
@@ -202,7 +202,7 @@ jobs:
           python -m pytest test_lambda_performance.py --benchmark-json=benchmark-results.json
 
       - name: Upload benchmark results
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: lambda-benchmarks
           path: tests/lambda/benchmark-results.json
@@ -302,7 +302,7 @@ jobs:
 
       - name: Upload compatibility test results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: lambda-compatibility-results
           path: tests/lambda/compatibility-*.log
diff --git a/.github/workflows/release-candidate.yml b/.github/workflows/release-candidate.yml
index f63fa4a9..a8b2f3c1 100644
--- a/.github/workflows/release-candidate.yml
+++ b/.github/workflows/release-candidate.yml
@@ -188,7 +188,7 @@ jobs:
           "
 
       - name: Upload build artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: honeyhive-python-sdk-${{ env.RC_VERSION }}
           path: dist/
diff --git a/.github/workflows/tox-full-suite.yml b/.github/workflows/tox-full-suite.yml
index 6f1f4589..01aa8e92 100644
--- a/.github/workflows/tox-full-suite.yml
+++ b/.github/workflows/tox-full-suite.yml
@@ -143,7 +143,7 @@ jobs:
 
       - name: Upload test results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: test-results-python-${{ matrix.python-version }}
           path: |
@@ -244,7 +244,7 @@ jobs:
 
       - name: Upload quality results
         if: always()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: quality-results
           path: |
@@ -253,7 +253,7 @@ jobs:
           retention-days: 7
 
       - name: Upload documentation build
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: documentation-build
           path: docs/_build/html/
@@ -335,7 +335,7 @@ jobs:
 
       - name: Upload integration test results
         if: always() && steps.check_credentials.outputs.has_honeyhive_key == 'true'
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: integration-test-results
           path: |