diff --git a/.github/workflows/osxbinary.yml b/.github/workflows/osxbinary.yml
index 2e33fa48a..3d2b8a09b 100644
--- a/.github/workflows/osxbinary.yml
+++ b/.github/workflows/osxbinary.yml
@@ -31,7 +31,7 @@ jobs:
       - run: make
       - run: sudo make install
       - run: make osx-dmg
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: artifact-osx-14
           path: "*.dmg"
diff --git a/.github/workflows/tools.yml b/.github/workflows/tools.yml
index c516ed5ea..92e67ce2b 100644
--- a/.github/workflows/tools.yml
+++ b/.github/workflows/tools.yml
@@ -46,7 +46,7 @@ jobs:
       - run: make
       - run: sudo make install
       - run: make osx-dmg
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: artifact-osx-14
           path: "*.dmg"
@@ -65,7 +65,7 @@ jobs:
       - run: make
       - run: sudo make install
       - run: make osx-dmg
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: artifact-osx-15
           path: "*.dmg"
@@ -93,7 +93,7 @@ jobs:
           cp gambit* installer
           "${WIX}bin/candle" build_support/msw/gambit.wxs
           "${WIX}bin/light" -ext WixUIExtension gambit.wixobj
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           name: artifact-msw
           path: "*.msi"
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index e527dcb9b..b5a4fa517 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -27,6 +27,6 @@ jobs:
           python -m cibuildwheel --output-dir wheelhouse/
         env:
           CIBW_SKIP: "pp*"
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         with:
           path: ./wheelhouse/*.whl