diff --git a/src/shape_circle.scad b/src/shape_circle.scad
index 98602f1d..69acfc41 100644
--- a/src/shape_circle.scad
+++ b/src/shape_circle.scad
@@ -1,7 +1,7 @@
 /**
 * shape_circle.scad
 *
-* @copyright Justin Lin, 2017
+* @copyright Justin Lin, 2020
 * @license https://opensource.org/licenses/lgpl-3.0.html
 *
 * @see https://openhome.cc/eGossip/OpenSCAD/lib2x-shape_circle.html
diff --git a/src/sweep.scad b/src/sweep.scad
index 5fdcfa5c..6e65d81e 100644
--- a/src/sweep.scad
+++ b/src/sweep.scad
@@ -1,3 +1,13 @@
+/**
+* sweep.scad
+*
+* @copyright Justin Lin, 2020
+* @license https://opensource.org/licenses/lgpl-3.0.html
+*
+* @see https://openhome.cc/eGossip/OpenSCAD/lib2x-sweep.html
+*
+**/
+
 use <util/reverse.scad>;
 
 module sweep(sections, triangles = "SOLID") {