diff --git a/.github/workflows/chapter-1-workflow.yml b/.github/workflows/chapter-1-workflow.yml
index 2473f564..4364d21a 100644
--- a/.github/workflows/chapter-1-workflow.yml
+++ b/.github/workflows/chapter-1-workflow.yml
@@ -25,7 +25,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: 9.0.x
+          dotnet-version: 8.0.x
       - name: Restore dependencies
         run: dotnet restore
       - name: Build
@@ -43,7 +43,7 @@ jobs:
       - name: Setup .NET
         uses: actions/setup-dotnet@v3
         with:
-          dotnet-version: 9.0.x
+          dotnet-version: 8.0.x
       - name: Restore dependencies
         run: dotnet restore
       - name: Test