diff --git a/notebook_nueva/utils.py b/notebook_nueva/utils.py
index 38e78fe..c26dfea 100644
--- a/notebook_nueva/utils.py
+++ b/notebook_nueva/utils.py
@@ -66,7 +66,7 @@ def hex_vents(*, size, width, height):
         {
             "x": 0,
             "y": 0,
-            "shape": cq.Sketch().push(vent_positions).regularPolygon(size * 0.9, 6),
+            "shape": cq.Sketch().push(vent_positions).regularPolygon(size * 0.85, 6),
         }
     ]