diff --git a/appveyor.yml b/appveyor.yml
index 2e7a0c1550..eaeb95b29a 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -33,4 +33,23 @@ build_script:
     appveyor PushArtifact %BUILDFILE%
 
 
-    rem appveyor UpdateBuild -Version %BUILDFILE%
\ No newline at end of file
+    rem appveyor UpdateBuild -Version %BUILDFILE%
+
+install:
+ - ps: Write-Host "Installing .NET Core 3.1 SDK..." -ForegroundColor Cyan
+ - ps: Write-Host "Downloading..."
+ - ps: $exePath = "$env:TEMP\dotnet-sdk-3.1.404-win-x64.exe"
+ - ps: (New-Object Net.WebClient).DownloadFile('https://download.visualstudio.microsoft.com/download/pr/3366b2e6-ed46-48ae-bf7b-f5804f6ee4c9/186f681ff967b509c6c9ad31d3d343da/dotnet-sdk-3.1.404-win-x64.exe', $exePath)
+ - ps: Write-Host "Installing..."
+ - ps: cmd /c start /wait "$exePath" /quiet /norestart
+ - ps: del $exePath
+ - ps: Write-Host "Installed" -ForegroundColor Green
+ - ps: 
+ - ps: Write-Host "Installing .NET 5.0 SDK..." -ForegroundColor Cyan
+ - ps: Write-Host "Downloading..."
+ - ps: $exePath = "$env:TEMP\dotnet-sdk-5.0.100-win-x64.exe"
+ - ps: (New-Object Net.WebClient).DownloadFile('https://download.visualstudio.microsoft.com/download/pr/2892493e-df43-409e-af68-8b14aa75c029/53156c889fc08f01b7ed8d7135badede/dotnet-sdk-5.0.100-win-x64.exe', $exePath)
+ - ps: Write-Host "Installing..."
+ - ps: cmd /c start /wait "$exePath" /quiet /norestart
+ - ps: del $exePath
+ - ps: Write-Host "Installed" -ForegroundColor Green
\ No newline at end of file