diff --git a/app/internal/types.py b/app/internal/types.py
index c495d1d..3312e0d 100644
--- a/app/internal/types.py
+++ b/app/internal/types.py
@@ -206,7 +206,7 @@ class ActiveClient:
         return {
             "client_id": self.client_id,
             "nickname": self.nickname,
-            "active_token": self.active_token.to_dict()
+            "active_token": self.active_token.to_dict() if self.active_token else None
         }
 
     def __str__(self):