diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 59df5db1e..9a31916f5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -84,7 +84,7 @@ jobs:
           command: dotnet test --no-build --collect:"XPlat Code Coverage"
           attempt_limit: 2
       - name: Upload coverage
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Code coverage (MacOS)
           path: "**/coverage.cobertura.xml"
@@ -112,7 +112,7 @@ jobs:
           command: dotnet test --no-build --collect:"XPlat Code Coverage"
           attempt_limit: 2
       - name: Upload coverage
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Code coverage (Ubuntu)
           path: "**/coverage.cobertura.xml"
@@ -140,7 +140,7 @@ jobs:
           command: dotnet test --no-build --collect:"XPlat Code Coverage"
           attempt_limit: 2
       - name: Upload coverage
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Code coverage (Windows)
           path: "**/coverage.cobertura.xml"
diff --git a/.github/workflows/ci-stryker.yml b/.github/workflows/ci-stryker.yml
index b2229af16..a69df46fc 100644
--- a/.github/workflows/ci-stryker.yml
+++ b/.github/workflows/ci-stryker.yml
@@ -61,7 +61,7 @@ jobs:
           ../../tools/dotnet-stryker -f ../.github/stryker/Stryker.Config.Testing.json -v "${GITHUB_HEAD_REF}" -r "html" -r "cleartext" --since:main
           mv ./StrykerOutput/**/reports/*.html ./StrykerOutput/Reports/Testably.Abstractions.Testing-report.html
       - name: Upload Stryker reports
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Stryker
           path: Tests/StrykerOutput/Reports/*
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e26712d58..b5ce2c67f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,12 +30,12 @@ jobs:
           attempt_limit: 2
       - name: Upload test results (MacOS)
         if: ${{ always() }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Test results (MacOS)
           path: TestResults
       - name: Upload coverage
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Code coverage (MacOS)
           path: "**/coverage.cobertura.xml"
@@ -64,12 +64,12 @@ jobs:
           attempt_limit: 2
       - name: Upload test results (Ubuntu)
         if: ${{ always() }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Test results (Ubuntu)
           path: TestResults
       - name: Upload coverage
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Code coverage (Ubuntu)
           path: "**/coverage.cobertura.xml"
@@ -98,12 +98,12 @@ jobs:
           attempt_limit: 2
       - name: Upload test results (Windows)
         if: ${{ always() }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Test results (Windows)
           path: TestResults
       - name: Upload coverage
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Code coverage (Windows)
           path: "**/coverage.cobertura.xml"
@@ -128,7 +128,7 @@ jobs:
         run: vstest.console.exe .\Build\Tests\Testably.Abstractions.Tests\net48\Testably.Abstractions.Tests.dll .\Build\Tests\Testably.Abstractions.Parity.Tests\net48\Testably.Abstractions.Parity.Tests.dll .\Build\Tests\Testably.Abstractions.Testing.Tests\net48\Testably.Abstractions.Testing.Tests.dll /Logger:trx /ResultsDirectory:TestResults
       - name: Upload test results (.NET Framework)
         if: ${{ always() }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: Test results (.NET Framework)
           path: TestResults
@@ -146,7 +146,7 @@ jobs:
         run: echo ${{ github.event.number }} > PR_NUMBER.txt
       - name: Archive PR number
         if: github.event_name == 'pull_request'
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: PR_NUMBER
           path: PR_NUMBER.txt