diff --git a/ci/gitlab-ci.yml b/ci/gitlab-ci.yml
index 658b24a0201e398f58f1f027de4932311e1f4cfb..5473e78aa3cefefd481c73a26d2bd848bb364119 100644
--- a/ci/gitlab-ci.yml
+++ b/ci/gitlab-ci.yml
@@ -54,7 +54,7 @@ verify-python:
 
 verify-dotnet:
   stage: lint
-  image: mcr.microsoft.com/dotnet/sdk:8.0
+  image: mcr.microsoft.com/dotnet/sdk:9.0
   before_script:
     - cd dotnet
   script: