diff --git a/infra/config/global/cr-buildbucket.cfg b/infra/config/global/cr-buildbucket.cfg
index 87562ad..afa5f60 100644
--- a/infra/config/global/cr-buildbucket.cfg
+++ b/infra/config/global/cr-buildbucket.cfg
@@ -29,6 +29,7 @@
 builder_mixins {
   name: "internal"
   dimensions: "internal:true"
+  dimensions: "cores:2"
 }
 
 builder_mixins {