diff --git a/README.md b/README.md
index 952614f..2d96310 100644
--- a/README.md
+++ b/README.md
@@ -3,5 +3,8 @@ Legood is a set of graphic objects for making diagrams in the shape of Lego bric
 It is provided in the Scalable Vector Graphic format, made with Inkscape.
 SVG should be portable enough to be opened in many other softwares (Illustrator, Corel, Gimp, LibreOffice, any browser...).
 
+Legood is covered by the CC-BY license, so when making diagram with it, you must indicate its origin.
+For instance, by adding: "(made with [Legood](https://github.com/nojhan/legood))".
+
 ![A set of colored Lego bricks, arrows and a diagram](https://raw.githubusercontent.com/nojhan/legood/main/legood.svg)