diff --git a/README.md b/README.md
index da9519fc..ec12e1c2 100644
--- a/README.md
+++ b/README.md
@@ -138,7 +138,7 @@ These examples incubate dotSCAD and dotSCAD refactors these examples. See [examp
 - [util/dedup](https://openhome.cc/eGossip/OpenSCAD/lib3x-dedup.html)
 - [util/every](https://openhome.cc/eGossip/OpenSCAD/lib3x-every.html)
 - [util/fibseq](https://openhome.cc/eGossip/OpenSCAD/lib3x-fibseq.html)	
-- [util/flat](https://openhome.cc/eGossip/OpenSCAD/lib2x-flat.html)
+- [util/flat](https://openhome.cc/eGossip/OpenSCAD/lib3x-flat.html)
 - [util/has](https://openhome.cc/eGossip/OpenSCAD/lib2x-has.html)
 - [util/lerp](https://openhome.cc/eGossip/OpenSCAD/lib2x-lerp.html)
 - [util/parse_number](https://openhome.cc/eGossip/OpenSCAD/lib2x-parse_number.html)
diff --git a/docs/lib2x-flat.md b/docs/lib3x-flat.md
similarity index 87%
rename from docs/lib2x-flat.md
rename to docs/lib3x-flat.md
index ee73ebf8..b42559c5 100644
--- a/docs/lib2x-flat.md
+++ b/docs/lib3x-flat.md
@@ -7,7 +7,7 @@ returns a new list with all sub-list elements concatenated into it recursively u
 ## Parameters
 
 - `lt` : The original list.
-- `depth` : Defaults to 1. The depth level specifying how deep a nested list should be flattened. 
+- `depth` : Default to 1. The depth level specifying how deep a nested list should be flattened. 
 
 ## Examples
 
diff --git a/src/util/flat.scad b/src/util/flat.scad
index eb8942a1..1a4bb7b2 100644
--- a/src/util/flat.scad
+++ b/src/util/flat.scad
@@ -4,7 +4,7 @@
 * @copyright Justin Lin, 2020
 * @license https://opensource.org/licenses/lgpl-3.0.html
 *
-* @see https://openhome.cc/eGossip/OpenSCAD/lib2x-flat.html
+* @see https://openhome.cc/eGossip/OpenSCAD/lib3x-flat.html
 *
 **/