diff --git a/examples/7nodes/istanbul-start.sh b/examples/7nodes/istanbul-start.sh
index 13787a2..c91e54c 100755
--- a/examples/7nodes/istanbul-start.sh
+++ b/examples/7nodes/istanbul-start.sh
@@ -2,7 +2,7 @@
 set -u
 set -e
 
-GLOBAL_ARGS="--mine --rpc --rpcaddr 0.0.0.0 --rpcapi admin,db,eth,debug,miner,net,shh,txpool,personal,web3,quorum,istanbul"
+GLOBAL_ARGS="--syncmode full --mine --rpc --rpcaddr 0.0.0.0 --rpcapi admin,db,eth,debug,miner,net,shh,txpool,personal,web3,quorum,istanbul"
 
 echo "[*] Starting Constellation nodes"
 nohup constellation-node tm1.conf 2>> qdata/logs/constellation1.log &