diff --git a/compose-files/aquarius.yml b/compose-files/aquarius.yml
index cea9117..a5db451 100644
--- a/compose-files/aquarius.yml
+++ b/compose-files/aquarius.yml
@@ -31,5 +31,6 @@ services:
       EVENTS_ALLOW: "0"
       RUN_EVENTS_MONITOR: "1"
       AQUARIUS_URL: http://172.15.0.5:5000
+      EVENTS_MONITOR_SLEEP_TIME: ${EVENTS_MONITOR_SLEEP_TIME}
     volumes:
     - ${OCEAN_ARTIFACTS_FOLDER}:/ocean-contracts/artifacts/
diff --git a/start_ocean.sh b/start_ocean.sh
index 2011733..cf3100b 100755
--- a/start_ocean.sh
+++ b/start_ocean.sh
@@ -87,6 +87,7 @@ cp -r ./certs/* ${OCEAN_CERTS_FOLDER}
 export CONTRACTS_NETWORK_NAME="development"
 
 # Default Aquarius parameters: use Elasticsearch
+export EVENTS_MONITOR_SLEEP_TIME=5
 export DB_MODULE="elasticsearch"
 export DB_HOSTNAME="http://172.15.0.6"
 export DB_PORT="9200"