diff --git a/ai_infra/imap_engine.py b/ai_infra/imap_engine.py
index 21c3aa143d1d3217e0f88529808a40c2844a5b22..692a1f2be41f9ae4b82fa01db005dc0b3006ba21 100644
--- a/ai_infra/imap_engine.py
+++ b/ai_infra/imap_engine.py
@@ -66,7 +66,7 @@ class EngineIMAP():
         """ Logic optimization by "rewrite" algorithm, mainly for area reduction
 
         Args:
-            priority_size (int, optional): The max store size of the cut for a node. Range of [6,20]. Defaults to 10.
+            priority_size (int, optional): The max store size of the cut for a node. Range of [6,12]. Defaults to 10.
             cut_size (int, optional): The max input size of a cut. Range of [2,4]. Defaults to 4.
             level_preserve (bool, optional): Preserve depth after optimization. Defaults to False.
             zero_gain (bool, optional): Allow zero-cost-based local replacement. Defaults to False.