diff --git a/services/posture-check/weather-day-report.py b/services/posture-check/weather-day-report.py
index 903794c..cb40f62 100644
--- a/services/posture-check/weather-day-report.py
+++ b/services/posture-check/weather-day-report.py
@@ -127,7 +127,7 @@ def read_token(token_file: str) -> str:
     if token:
         return token
     try:
-        with open(token_file, "r", encoding="utf-8") as handle:
+        with open(token_file, "r", encoding="utf-8-sig") as handle:
             token = handle.read().strip()
     except FileNotFoundError as exc:
         raise WeatherReportError(