diff --git a/cloudbuild.yaml b/cloudbuild.yaml
index 42117c32..52262265 100644
--- a/cloudbuild.yaml
+++ b/cloudbuild.yaml
@@ -4,7 +4,7 @@ timeout: 10800s
 # The default disk size is 100GB. However, the stage1 ISOs are pretty big these
 # days. 200GB  should give us some breathing room.
 options:
-  diskSizeGb: 200
+  diskSizeGb: 400
 
 ############################################################################
 # BUILD ARTIFACTS