diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 63fb87ce69..e882fe306a 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -53,14 +53,14 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Upload failed benchmark artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: failed-benchmark-${{ matrix.os }}-${{ matrix.python-version }}-${{ github.run_id }}
           path: autotest/.failed/**
 
       - name: Upload benchmark result artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: benchmarks-${{ matrix.os }}-${{ matrix.python-version }}-${{ github.run_id }}
           path: autotest/.benchmarks/**/*.json
@@ -131,7 +131,7 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Upload benchmark results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: benchmarks-${{ github.run_id }}
           path: |
diff --git a/.github/workflows/commit.yml b/.github/workflows/commit.yml
index 000cb68952..b549d7e640 100644
--- a/.github/workflows/commit.yml
+++ b/.github/workflows/commit.yml
@@ -130,7 +130,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Upload failed test outputs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: failed-smoke-${{ runner.os }}-${{ env.PYTHON_VERSION }}
@@ -199,7 +199,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Upload failed test outputs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: failed-${{ matrix.os }}-${{ matrix.python-version }}
diff --git a/.github/workflows/examples.yml b/.github/workflows/examples.yml
index 5540c9f0cc..d021a66a53 100644
--- a/.github/workflows/examples.yml
+++ b/.github/workflows/examples.yml
@@ -74,7 +74,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Upload failed test outputs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: failed-example-${{ matrix.os }}-${{ matrix.python-version }}
diff --git a/.github/workflows/optional.yml b/.github/workflows/optional.yml
index ca4040b8a1..e5a1637746 100644
--- a/.github/workflows/optional.yml
+++ b/.github/workflows/optional.yml
@@ -52,7 +52,7 @@ jobs:
           fi
       
       - name: Upload removed dependencies log
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: smoke-test-removed-dependencies
           path: ./removed_dependencies.txt
@@ -67,7 +67,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Upload failed test outputs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: failed-smoke-${{ runner.os }}-${{ env.PYTHON_VERSION }}
diff --git a/.github/workflows/regression.yml b/.github/workflows/regression.yml
index b11c9d9d5c..7bbc672fe1 100644
--- a/.github/workflows/regression.yml
+++ b/.github/workflows/regression.yml
@@ -58,7 +58,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Upload failed test outputs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: failed-regression-${{ matrix.os }}-${{ matrix.python-version }}
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index ca701a23b5..70c9602ac5 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -73,7 +73,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Upload failed test outputs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: failed-${{ matrix.os }}-${{ matrix.python-version }}
@@ -111,7 +111,7 @@ jobs:
           sed -i '1i # Changelog' $clog
 
       - name: Upload changelog
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: changelog
           path: CHANGELOG.md
@@ -231,7 +231,7 @@ jobs:
         run: twine check --strict dist/*
 
       - name: Upload package
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: dist
           path: dist
diff --git a/.github/workflows/rtd.yml b/.github/workflows/rtd.yml
index af6cc0749b..fe3f7a98f5 100644
--- a/.github/workflows/rtd.yml
+++ b/.github/workflows/rtd.yml
@@ -77,7 +77,7 @@ jobs:
 
       - name: Upload notebooks artifact for ReadtheDocs
         if: github.repository_owner == 'modflowpy' && github.event_name == 'push' && runner.os == 'Linux'
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: notebooks-for-${{ github.sha }}
           path: .docs/Notebooks/*.ipynb