diff --git a/common.sh b/common.sh
index f0e6f4105..0d957f078 100644
--- a/common.sh
+++ b/common.sh
@@ -235,7 +235,7 @@ export MASTER_DISK=${MASTER_DISK:-30}
 export MASTER_VCPU=${MASTER_VCPU:-8}
 
 export WORKER_MEMORY=${WORKER_MEMORY:-8192}
-export WORKER_DISK=${WORKER_DISK:-20}
+export WORKER_DISK=${WORKER_DISK:-30}
 export WORKER_VCPU=${WORKER_VCPU:-4}
 
 export EXTRA_WORKER_MEMORY=${EXTRA_WORKER_MEMORY:-${WORKER_MEMORY}}