diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 860c584..6850489 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,6 +2,8 @@
   tags:
   - windows
 
+image: mcr.microsoft.com/dotnet/framework/sdk:4.8
+
 before_script:
   - dotnet restore