diff --git a/infra/config/generated/cr-buildbucket.cfg b/infra/config/generated/cr-buildbucket.cfg
index d4d54aafff..67556497e1 100644
--- a/infra/config/generated/cr-buildbucket.cfg
+++ b/infra/config/generated/cr-buildbucket.cfg
@@ -26,6 +26,7 @@ buckets {
         '{'
         '  "recipe": "hello_world"'
         '}'
+      service_account: "crosvm-luci-ci-builder@crosvm-infra.iam.gserviceaccount.com"
       experiments {
         key: "luci.recipes.use_python3"
         value: 100
diff --git a/infra/config/generated/realms.cfg b/infra/config/generated/realms.cfg
index 2cf7abd533..62221125a9 100644
--- a/infra/config/generated/realms.cfg
+++ b/infra/config/generated/realms.cfg
@@ -57,6 +57,10 @@ realms {
 }
 realms {
   name: "ci"
+  bindings {
+    role: "role/buildbucket.builderServiceAccount"
+    principals: "user:crosvm-luci-ci-builder@crosvm-infra.iam.gserviceaccount.com"
+  }
   bindings {
     role: "role/buildbucket.triggerer"
     principals: "group:mdb/crosvm-acl-luci-admin"
diff --git a/infra/config/main.star b/infra/config/main.star
index b29e239a28..152bd658c1 100755
--- a/infra/config/main.star
+++ b/infra/config/main.star
@@ -122,4 +122,5 @@ luci.builder(
         name = "hello_world",
     ),
     schedule = "with 1m interval",
+    service_account = "crosvm-luci-ci-builder@crosvm-infra.iam.gserviceaccount.com",
 )