diff --git a/requirements.txt b/requirements.txt
index 6edd9edf..e43ea4fc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -95,3 +95,5 @@ babel
 # Needed for > 3.10, https://github.com/microsoft/playwright-python/issues/2096
 greenlet >= 3.0.3
 
+# Scheduler - Windows seemed to miss a lot of default timezone info (even "UTC" !)
+tzdata