diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 203878c..42dcc9f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,10 +16,10 @@ jobs:
   dotnet:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           persist-credentials: false
-      - uses: actions/setup-dotnet@v5
+      - uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json
       - run: dotnet restore HitTheKit.sln
@@ -29,7 +29,7 @@ jobs:
   repository-contracts:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           persist-credentials: false
       - name: Validate public-readiness contracts
@@ -59,7 +59,7 @@ jobs:
   macos-packaging-contracts:
     runs-on: macos-15
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           persist-credentials: false
       - run: bash tests/scripts/macos-signing-foundation-tests.sh
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 6ea5963..bccdb4c 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -15,10 +15,10 @@ jobs:
   analyze:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           persist-credentials: false
-      - uses: actions/setup-dotnet@v5
+      - uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json
       - uses: github/codeql-action/init@v4
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index cc58c4c..44d3c5c 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -24,13 +24,13 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           persist-credentials: false
       - uses: actions/configure-pages@v5
-      - uses: actions/upload-pages-artifact@v4
+      - uses: actions/upload-pages-artifact@v5
         with:
           path: website
       - name: Deploy website
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v5
diff --git a/.github/workflows/source-release.yml b/.github/workflows/source-release.yml
index d91bb81..3fa2e7b 100644
--- a/.github/workflows/source-release.yml
+++ b/.github/workflows/source-release.yml
@@ -19,10 +19,10 @@ jobs:
     env:
       RELEASE_VERSION: ${{ inputs.version }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           persist-credentials: false
-      - uses: actions/setup-dotnet@v5
+      - uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json
       - name: Verify release input
@@ -45,7 +45,7 @@ jobs:
         with:
           subject-path: artifacts/source/HitTheKit-source-${{ inputs.version }}.tar.gz
       - name: Upload source release evidence
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: HitTheKit-source-${{ inputs.version }}
           path: artifacts/source
diff --git a/tests/HitTheKit.Core.Tests/HitTheKit.Core.Tests.csproj b/tests/HitTheKit.Core.Tests/HitTheKit.Core.Tests.csproj
index 300d7c3..a24bdde 100644
--- a/tests/HitTheKit.Core.Tests/HitTheKit.Core.Tests.csproj
+++ b/tests/HitTheKit.Core.Tests/HitTheKit.Core.Tests.csproj
@@ -10,9 +10,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="4.0.0" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/tests/HitTheKit.MidiCapture.Tests/HitTheKit.MidiCapture.Tests.csproj b/tests/HitTheKit.MidiCapture.Tests/HitTheKit.MidiCapture.Tests.csproj
index 109f81c..2f32b50 100644
--- a/tests/HitTheKit.MidiCapture.Tests/HitTheKit.MidiCapture.Tests.csproj
+++ b/tests/HitTheKit.MidiCapture.Tests/HitTheKit.MidiCapture.Tests.csproj
@@ -7,9 +7,9 @@
     <IsTestProject>true</IsTestProject>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.9.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="4.0.0" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="../../tools/HitTheKit.MidiCapture/HitTheKit.MidiCapture.csproj" />