diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index f34c1eeea..de39c6f97 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -34,16 +34,6 @@ jobs:
         $process.Start()
         $process.WaitForExit()
         
-    - name: Install .NET Core
-      uses: actions/setup-dotnet@v2
-      with:
-        dotnet-version: 3.1.x
-
-    - name: Install .NET 5
-      uses: actions/setup-dotnet@v2
-      with:
-        dotnet-version: 5.0.x
-
     - name: Install .NET 6
       uses: actions/setup-dotnet@v2
       with: