diff --git a/motors.scad b/motors.scad
index ac3161a..3438645 100644
--- a/motors.scad
+++ b/motors.scad
@@ -1,4 +1,4 @@
-// License: GPL 2.0
+// This library is dual licensed under the GPL 3.0 and the GNU Lesser General Public License as per http://creativecommons.org/licenses/LGPL/2.1/ .
 
 include <math.scad>
 
diff --git a/nuts_and_bolts.scad b/nuts_and_bolts.scad
index 3ad37f3..e680385 100644
--- a/nuts_and_bolts.scad
+++ b/nuts_and_bolts.scad
@@ -1,4 +1,4 @@
-// License: GPL 2.0
+// This library is dual licensed under the GPL 3.0 and the GNU Lesser General Public License as per http://creativecommons.org/licenses/LGPL/2.1/ .
 
 //testNutsAndBolts();