diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9da41a8..64d1b2c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,5 +1,5 @@
 ---
-image: microsoft/dotnet:latest
+image: mcr.microsoft.com/dotnet/core/sdk:3.0-alpine3.11
 
 
 variables: