diff --git a/README.md b/README.md
index 7794eb2..efd3123 100644
--- a/README.md
+++ b/README.md
@@ -53,3 +53,7 @@ The repository is separated into two parts. See more information in the [Develop
   - Show model information (model size, vertex and polygon count)
 - Export model to various format
 - Embed viewer in your website
+
+## External Libraries
+
+Online 3D Viewer uses these wonderful libraries: [jquery](https://github.com/jquery/jquery), [three.js](https://github.com/mrdoob/three.js), [rhino3dm](https://github.com/mcneel/rhino3dm).