diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c4b5baa..01c106d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,4 +1,4 @@
-image: microsoft/dotnet:latest
+image: mcr.microsoft.com/dotnet/core/sdk:3.0
 
 before_script:
     - dotnet restore