diff --git a/env.example b/env.example
index b856f5f..319fba7 100644
--- a/env.example
+++ b/env.example
@@ -144,3 +144,4 @@ CURRENT_COUNTER_PATH=/tmp/bytetrack_current_counter.json
 
 SAVE_CROSS_SNAPSHOT=true
 CROSS_SNAPSHOT_DIR=/opt/zenai-kpc-snaps/snapshots
+CROSS_SNAPSHOT_CLEANUP_SEC=3600