diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e2bf27c..b8db9b4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -24,6 +24,7 @@ build:
         - if: $CI_COMMIT_BRANCH
 
 test:
+    image: mcr.microsoft.com/dotnet/sdk:5.0
     stage: test
     script:
         - 'dotnet test --test-adapter-path:. --logger:"junit;LogFilePath=../artifacts/{assembly}-test-result.xml;MethodFormat=Default;FailureBodyFormat=Verbose" --collect:"XPlat Code Coverage"'
@@ -45,6 +46,7 @@ test:
                 - ./coverage/Cobertura.xml
 
 publish:
+    image: mcr.microsoft.com/dotnet/sdk:5.0
     stage: release
     script:
         - npm install --ci