diff --git a/start_ocean.sh b/start_ocean.sh
index 605815f..76a7d59 100755
--- a/start_ocean.sh
+++ b/start_ocean.sh
@@ -30,7 +30,7 @@ COMPOSE_DIR="${DIR}/compose-files"
 
 export AQUARIUS_VERSION=${AQUARIUS_VERSION:-v2.2.12}
 export PROVIDER_VERSION=${PROVIDER_VERSION:-v0.4.12}
-export CONTRACTS_VERSION=${CONTRACTS_VERSION:-v0.6.4}
+export CONTRACTS_VERSION=${CONTRACTS_VERSION:-v4Hardhat}
 export RBAC_VERSION=${RBAC_VERSION:-next}
 export PROJECT_NAME="ocean"
 export FORCEPULL="false"