diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 301fa13151..ce9124bd86 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: microsoft/dotnet:latest
+image: mcr.microsoft.com/dotnet/core/sdk:3.1
 
 stages:
   - build