diff --git a/bitbucket-pipelines.yml b/bitbucket-pipelines.yml
index bf45485..ffbefd2 100644
--- a/bitbucket-pipelines.yml
+++ b/bitbucket-pipelines.yml
@@ -1,4 +1,4 @@
-image: mcr.microsoft.com/dotnet/core/sdk:latest
+image: mcr.microsoft.com/dotnet/core/sdk:3.1
 
 pipelines:
   branches: