diff --git a/src/data_collection/jma_amedas_sources.py b/src/data_collection/jma_amedas_sources.py
index ff2ac32f..65927ed5 100644
--- a/src/data_collection/jma_amedas_sources.py
+++ b/src/data_collection/jma_amedas_sources.py
@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import threading
 import time
 from datetime import datetime
 from typing import Any, Dict, List, Optional