diff --git a/src/pyshark/packet/packet.py b/src/pyshark/packet/packet.py
index 627a196e..b0a823d9 100644
--- a/src/pyshark/packet/packet.py
+++ b/src/pyshark/packet/packet.py
@@ -83,6 +83,8 @@ def __bool__(self):
 
     @property
     def sniff_time(self) -> datetime.datetime:
+        if self.sniff_timestamp[-1] == 'Z':
+            return datetime.datetime.fromisoformat(self.sniff_timestamp)
         try:
             timestamp = float(self.sniff_timestamp)
         except ValueError: