diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index baa4e4e..c5446b2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -30,7 +30,7 @@ jobs:
           echo "Runner OS: ${{ runner.os }}"
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json
           cache: true
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index bf713cd..7b359fe 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -22,7 +22,7 @@ jobs:
       - uses: actions/checkout@v7
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json
           cache: true
diff --git a/.github/workflows/docs-publish.yml b/.github/workflows/docs-publish.yml
index 6ded252..10b1e6b 100644
--- a/.github/workflows/docs-publish.yml
+++ b/.github/workflows/docs-publish.yml
@@ -32,7 +32,7 @@ jobs:
           fetch-depth: 0
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json
 
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 897f1d8..9252f85 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -38,7 +38,7 @@ jobs:
           grep "\"version\"" src/ProjGraph.Mcp/.mcp/server.json
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json
           cache: true
diff --git a/.github/workflows/sonarqube.yml b/.github/workflows/sonarqube.yml
index acfad45..cfb314d 100644
--- a/.github/workflows/sonarqube.yml
+++ b/.github/workflows/sonarqube.yml
@@ -39,7 +39,7 @@ jobs:
           key: ${{ runner.os }}-sonar-scanner
           restore-keys: ${{ runner.os }}-sonar-scanner
       - name: Setup .NET
-        uses: actions/setup-dotnet@v5
+        uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json