diff --git a/DIRECTORY.md b/DIRECTORY.md
index f0a34a553..c8b9a9d3b 100644
--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -457,6 +457,7 @@
 
 ## Geometry
   * [Geometry](geometry/geometry.py)
+  * [Shoelace](geometry/shoelace.py)
 
 ## Graphics
   * [Bezier Curve](graphics/bezier_curve.py)