diff --git a/README.md b/README.md
index 80e2798..6aff4f2 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,5 @@
 The files used for hosting http://ogp.me/
 
-If you want to contribute, feel free to send pull requests and discuss any issues in the [Facebook Group](https://www.facebook.com/groups/opengraph/)
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+If you want to contribute, feel free to send pull requests and discuss any issues in the [Facebook Group](https://www.facebook.com/groups/opengraph/)
+
+You say that the website is open source ("This website is Open Source"). But according to the [open source definition](https://opensource.org/osd), you need a license. Where is the license of this repository?