diff --git a/.github/workflows/samples-console-app-with-di.ci.yml b/.github/workflows/samples-console-app-with-di.ci.yml
index ccbbf2e53..215948cc4 100644
--- a/.github/workflows/samples-console-app-with-di.ci.yml
+++ b/.github/workflows/samples-console-app-with-di.ci.yml
@@ -39,9 +39,9 @@ jobs:
           fetch-depth: 1
 
       - name: .NET SDK のセットアップ
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
         with:
-          global-json-file: samples/ConsoleAppWithDI/solution/global.json
+          dotnet-version: "8.*"
 
       - id: application-build
         name: アプリケーションのビルド
diff --git a/.github/workflows/samples-dressca-backend.ci.yml b/.github/workflows/samples-dressca-backend.ci.yml
index 8a5e06826..314027743 100644
--- a/.github/workflows/samples-dressca-backend.ci.yml
+++ b/.github/workflows/samples-dressca-backend.ci.yml
@@ -40,9 +40,9 @@ jobs:
           fetch-depth: 1
 
       - name: .NET SDK のセットアップ
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
         with:
-          global-json-file: samples/Dressca/dressca-backend/global.json
+          dotnet-version: '8.*'
 
       - name: NuGet パッケージの復元
         run: dotnet restore
@@ -74,8 +74,8 @@ jobs:
         env:
           APPSETTINGS_FILEPATH: tests/Dressca.IntegrationTest/appsettings.${{ env.TEST_ENVIRONMENT }}.json
         run: |
-           connectionString=$(cat ${{env.APPSETTINGS_FILEPATH}} | jq '.ConnectionStrings.DresscaDbContext')
-           echo "CONNECTION_STRING=${connectionString}" >> "$GITHUB_OUTPUT"
+          connectionString=$(cat ${{env.APPSETTINGS_FILEPATH}} | jq '.ConnectionStrings.DresscaDbContext')
+          echo "CONNECTION_STRING=${connectionString}" >> "$GITHUB_OUTPUT"
 
       - name: EF Core ツールのインストール(結合テスト用)
         shell: bash