diff --git a/build.py b/build.py
index dcb0e9e..bdacd5e 100644
--- a/build.py
+++ b/build.py
@@ -3,7 +3,7 @@ from build123d import *
 
 def build_mop_scraper_holder(center_thickness: float):
     mop_diameter = 23.4
-    mop_arc_size = 230
+    mop_arc_size = 240
 
     scraper_diameter = 20.3
     scraper_arc_size = mop_arc_size