diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 8559844..72c71cb 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -7,6 +7,11 @@ Added
 ^^^^^
 * ``Dumper.flush``.
 
+Changed
+^^^^^^^
+* ``ts_utcdatetime`` is now a tz aware datetime. ``ts_datetime`` is still naive as getting the local
+  timezone and its availability is still problematic in Python's standard library.
+
 Fixed
 ^^^^^
 * Don't crash if Npcap is not installed or fails to load.
diff --git a/cypcap/_cypcap.pyx b/cypcap/_cypcap.pyx
index ee1e91d..8721dc5 100644
--- a/cypcap/_cypcap.pyx
+++ b/cypcap/_cypcap.pyx
@@ -336,8 +336,8 @@ cdef class Pkthdr:
 
     @property
     def ts_utcdatetime(self) -> datetime:
-        """Timestamp as a naive UTC datetime."""
-        return datetime.utcfromtimestamp(self.ts)
+        """Timestamp as a UTC aware datetime."""
+        return datetime.fromtimestamp(self.ts, tz=timezone.utc)
 
     @ts_utcdatetime.setter
     def ts_utcdatetime(self, ts_utcdatetime: datetime):
diff --git a/tests/test_cypcap.py b/tests/test_cypcap.py
index 5f259d4..83bd3d5 100644
--- a/tests/test_cypcap.py
+++ b/tests/test_cypcap.py
@@ -1,6 +1,6 @@
 import os
 import socket
-from datetime import datetime
+from datetime import datetime, timezone
 import copy
 
 import dpkt
@@ -97,9 +97,9 @@ def test_pkthdr_ts_datetime():
 def test_pkthdr_ts_utcdatetime():
     pkthdr = cypcap.Pkthdr(PKTHDR_TS, PKTHDR_LEN, PKTHDR_LEN)
 
-    assert pkthdr.ts_utcdatetime == datetime.utcfromtimestamp(PKTHDR_TS)
+    assert pkthdr.ts_utcdatetime == datetime.fromtimestamp(PKTHDR_TS, timezone.utc)
 
-    now = datetime.now()
+    now = datetime.now(timezone.utc)
     pkthdr.ts_utcdatetime = now
     assert pkthdr.ts_utcdatetime == now