diff --git a/aider/analytics.py b/aider/analytics.py
index 7ef200490..cd86132d0 100644
--- a/aider/analytics.py
+++ b/aider/analytics.py
@@ -3,6 +3,7 @@ import uuid
 from pathlib import Path
 
 from mixpanel import Mixpanel
+from aider import __version__
 
 
 class Analytics:
@@ -31,4 +32,7 @@ class Analytics:
 
     def track_event(self, event_name, properties=None):
         if self.mp:
+            if properties is None:
+                properties = {}
+            properties['aider_version'] = __version__
             self.mp.track(self.user_id, event_name, properties)