diff --git a/.github/workflows/osxbinary.yml b/.github/workflows/osxbinary.yml
index 428a75a7e..025da0132 100644
--- a/.github/workflows/osxbinary.yml
+++ b/.github/workflows/osxbinary.yml
@@ -35,7 +35,7 @@ jobs:
       - run: make
       - run: sudo make install
       - run: make osx-dmg
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: artifact-osx-13
           path: "*.dmg"
diff --git a/.github/workflows/tools.yml b/.github/workflows/tools.yml
index 673145e82..4cd26bc61 100644
--- a/.github/workflows/tools.yml
+++ b/.github/workflows/tools.yml
@@ -54,7 +54,7 @@ jobs:
       - run: make
       - run: sudo make install
       - run: make osx-dmg
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: artifact-osx-13
           path: "*.dmg"
@@ -73,7 +73,7 @@ jobs:
       - run: make
       - run: sudo make install
       - run: make osx-dmg
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: artifact-osx-14
           path: "*.dmg"
@@ -101,7 +101,7 @@ jobs:
           cp gambit* installer
           "${WIX}bin/candle" gambit.wxs
           "${WIX}bin/light" -ext WixUIExtension gambit.wixobj
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: artifact-msw
           path: "*.msi"
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 2624184ec..ebc1c7431 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -31,6 +31,6 @@ jobs:
           python -m cibuildwheel --output-dir wheelhouse/
         env:
           CIBW_SKIP: "pp*"
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           path: ./wheelhouse/*.whl