diff --git a/scripts/launch_local_testnet.sh b/scripts/launch_local_testnet.sh
index 36639ba86..53eb5f1cb 100755
--- a/scripts/launch_local_testnet.sh
+++ b/scripts/launch_local_testnet.sh
@@ -827,7 +827,7 @@ if [[ "$REUSE_EXISTING_DATA_DIR" == "0" ]]; then
     ${REMOTE_URLS}
 fi
 
-GENESIS_OFFSET=40
+GENESIS_OFFSET=60  # See `Scheduling first slot action` > `startTime`
 NOW_UNIX_TIMESTAMP=$(date +%s)
 GENESIS_TIME=$((NOW_UNIX_TIMESTAMP + GENESIS_OFFSET))
 SHANGHAI_FORK_TIME=$((GENESIS_TIME + SECONDS_PER_SLOT * SLOTS_PER_EPOCH * CAPELLA_FORK_EPOCH))