diff --git a/configs/full_pipeline_1080p_test_alarm.json b/configs/full_pipeline_1080p_test_alarm.json
index 2dbab20..e3db0ca 100644
--- a/configs/full_pipeline_1080p_test_alarm.json
+++ b/configs/full_pipeline_1080p_test_alarm.json
@@ -373,7 +373,7 @@
               "name": "known_person",
               "type": "person",
               "cooldown_ms": 7000,
-              "min_sim": 0.6,
+              "min_sim": 0.5,
               "min_hits": 1,
               "hit_window_ms": 1500,
               "min_face_area_ratio": 0.01,