diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 47cb66302..ca48b4d55 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -33,6 +33,7 @@ not released yet
 * NEW support for color theme, command, and formatter plugins
 * FIX an issue where ikhal would forget changes to time or date fields if you
   left the field with page up/down or meta+enter
+* UPDATED REQUIREMENT icalendar is now required >= 6.0.0
 
 0.11.3
 ======
diff --git a/khal/icalendar.py b/khal/icalendar.py
index 39e6eda8f..3d1fcd71f 100644
--- a/khal/icalendar.py
+++ b/khal/icalendar.py
@@ -37,6 +37,10 @@
 
 logger = logging.getLogger('khal')
 
+# Force use of pytz because we rely on functionalities not available in
+# zoneinfo.
+icalendar.use_pytz()
+
 
 def split_ics(ics: str, random_uid: bool=False, default_timezone=None) -> List:
     """split an ics string into several according to VEVENT's UIDs
diff --git a/pyproject.toml b/pyproject.toml
index 597a6046a..7dc930926 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,7 +27,7 @@ requires-python = ">=3.8,<3.13"
 dependencies = [
     "click>=3.2",
     "click_log>=0.2.0",
-    "icalendar>=4.0.3",
+    "icalendar>=6.0.0",
     "urwid>=2.6.15",
     "pyxdg",
     "pytz",