diff --git a/requirements.txt b/requirements.txt
index 847a4b47..3188b374 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -49,7 +49,7 @@ python-dateutil>=2.9.0
 pytz>=2025.0
 six>=1.17.0
 typing-extensions>=4.14.0
-tzdata>=2025.0
+tzdata>=2026.3
 tzlocal>=5.3.0
 
 # Out-of-core / chunked array processing for large recordings (> 500 MB)