diff --git a/.github/workflows/dotnet-core.yml b/.github/workflows/dotnet-core.yml
index 347cb80..344aab6 100644
--- a/.github/workflows/dotnet-core.yml
+++ b/.github/workflows/dotnet-core.yml
@@ -16,7 +16,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 3.1.301
+        dotnet-version: 2.1.22
     - name: Install dependencies
       run: dotnet restore
     - name: Build
diff --git a/Hzexe.FastDownloader.sln b/Hzexe.FastDownloader.sln
index cb90e5c..d26e4d3 100644
--- a/Hzexe.FastDownloader.sln
+++ b/Hzexe.FastDownloader.sln
@@ -9,6 +9,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Hzexe.FastDownloaderTests",
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{E6214D33-E194-4136-B9F1-CA0847B150F4}"
 	ProjectSection(SolutionItems) = preProject
+		.github\workflows\dotnet-core.yml = .github\workflows\dotnet-core.yml
 		README.md = README.md
 	EndProjectSection
 EndProject