diff --git a/cloudbuild.yaml b/cloudbuild.yaml
index 6cf54da..9d4f38c 100644
--- a/cloudbuild.yaml
+++ b/cloudbuild.yaml
@@ -82,6 +82,7 @@ substitutions:
   _AGENT_SA: osvauco-agent-sa@propane-will-491900-m5.iam.gserviceaccount.com
 
 options:
+  substitutionOption: ALLOW_LOOSE
   logging: CLOUD_LOGGING_ONLY
   machineType: E2_HIGHCPU_8