diff --git a/src/dexorder/base/order.py b/src/dexorder/base/order.py
index 9d74b7b..9b85a92 100644
--- a/src/dexorder/base/order.py
+++ b/src/dexorder/base/order.py
@@ -15,7 +15,7 @@ class OrderKey:
         return OrderKey(vault, int(order_index))
 
     def __str__(self):
-        return f'{self.vault}|{self.order_index:05}'
+        return f'{self.vault}|{self.order_index}'
 
 
 @dataclass(frozen=True, eq=True)