diff --git a/docker-scripts.sh b/docker-scripts.sh
index ebc8b1a..0f619b9 100644
--- a/docker-scripts.sh
+++ b/docker-scripts.sh
@@ -111,8 +111,8 @@ lnbits-lightning-init(){
   echo "mining 10 blocks..."
   bitcoin-cli-sim -generate 10 > /dev/null
 
-  echo "wait for 15s..."
-  sleep 15 # else blockheight tests fail for cln
+  echo "wait for 20s..."
+  sleep 20 # else blockheight tests fail for cln
 
   lnbits-lightning-sync
 
@@ -163,7 +163,6 @@ lnbits-lightning-init(){
   bitcoin-cli-sim -generate 10 > /dev/null
   wait-for-lnd-channel 3
 
-
   # cln-1 -> cln-2
   peerid=$(connect_clightning_node 1 2)
   echo "open channel from cln-1 to cln-2"