diff --git a/README.md b/README.md
index b08b1973..fec08799 100644
--- a/README.md
+++ b/README.md
@@ -82,7 +82,7 @@ These examples incubate dotSCAD and dotSCAD refactors these examples. See [examp
 
 ### 2D/3D Function
 - [bezier_surface](https://openhome.cc/eGossip/OpenSCAD/lib2x-bezier_surface.html)	
-- [bezier_smooth](https://openhome.cc/eGossip/OpenSCAD/lib2x-bezier_smooth.html)	
+- [bezier_smooth](https://openhome.cc/eGossip/OpenSCAD/lib3x-bezier_smooth.html)	
 - [cross_sections](https://openhome.cc/eGossip/OpenSCAD/lib2x-cross_sections.html)
 - [in_polyline](https://openhome.cc/eGossip/OpenSCAD/lib2x-in_polyline.html)
 - [paths2sections](https://openhome.cc/eGossip/OpenSCAD/lib2x-paths2sections.html)
diff --git a/docs/images/lib2x-bezier_smooth-1.JPG b/docs/images/lib3x-bezier_smooth-1.JPG
similarity index 100%
rename from docs/images/lib2x-bezier_smooth-1.JPG
rename to docs/images/lib3x-bezier_smooth-1.JPG
diff --git a/docs/images/lib2x-bezier_smooth-2.JPG b/docs/images/lib3x-bezier_smooth-2.JPG
similarity index 100%
rename from docs/images/lib2x-bezier_smooth-2.JPG
rename to docs/images/lib3x-bezier_smooth-2.JPG
diff --git a/docs/lib2x-bezier_smooth.md b/docs/lib3x-bezier_smooth.md
similarity index 81%
rename from docs/lib2x-bezier_smooth.md
rename to docs/lib3x-bezier_smooth.md
index 3484d9fa..a7cca394 100644
--- a/docs/lib2x-bezier_smooth.md
+++ b/docs/lib3x-bezier_smooth.md
@@ -8,6 +8,7 @@ Given a path, the `bezier_smooth` function uses bazier curves to smooth all corn
 - `round_d` : Used to create the other two control points at the corner.
 - `t_step` : The distance between two points of the Bézier path at the corner. It defaults to 0.1.
 - `closed` : It defaults to `false`. If you have a closed path, set it to `true`.
+- `angle_threshold` : Default to 0. If the angle between two line segments is bigger than `angle_threshold`, smooth those two segments. **Since:** 3.0
 
 ## Examples
 
@@ -34,7 +35,7 @@ Given a path, the `bezier_smooth` function uses bazier curves to smooth all corn
 		smoothed_path_pts, width
 	);
 
-![bezier_smooth](images/lib2x-bezier_smooth-1.JPG)
+![bezier_smooth](images/lib3x-bezier_smooth-1.JPG)
 
 	use <bezier_smooth.scad>;
 
@@ -52,4 +53,4 @@ Given a path, the `bezier_smooth` function uses bazier curves to smooth all corn
 
 	translate([50, 0, 0]) polygon(smoothed_path_pts);
 
-![bezier_smooth](images/lib2x-bezier_smooth-2.JPG)
\ No newline at end of file
+![bezier_smooth](images/lib3x-bezier_smooth-2.JPG)
\ No newline at end of file
diff --git a/src/bezier_smooth.scad b/src/bezier_smooth.scad
index baba9243..b9ebe3f0 100644
--- a/src/bezier_smooth.scad
+++ b/src/bezier_smooth.scad
@@ -4,7 +4,7 @@
 * @copyright Justin Lin, 2017
 * @license https://opensource.org/licenses/lgpl-3.0.html
 *
-* @see https://openhome.cc/eGossip/OpenSCAD/lib2x-bezier_curve.html
+* @see https://openhome.cc/eGossip/OpenSCAD/lib3x-bezier_curve.html
 *
 **/