diff --git a/docs/hackathon.rst b/docs/hackathon.rst
index e51ec74..242f974 100644
--- a/docs/hackathon.rst
+++ b/docs/hackathon.rst
@@ -6,4 +6,6 @@
 - 3rd NDN Hackathon: `Mini-NDN cluster <https://github.com/3rd-ndn-hackathon/mini-NDN-cluster>`_.
 - 4th NDN Hackathon: `Mini-NDN wifi <https://github.com/4th-ndn-hackathon/Mini-NDN-Wi-Fi>`_.
 - 7th NDN Hackathon: `Mini-NDN documentation <https://github.com/7th-ndn-hackathon/mini-ndn-documentation>`_.
+- 11th NDN Hackathon: `Mini-NDN improvements <https://11th-ndn-hackathon.named-data.net/hacks.html#8-mini-ndn-improvements>`_.
+- 12th NDN Hackathon: `Mini-NDN improvements and Refactoring <https://12th-ndn-hackathon.named-data.net/hacks.html#7-mini-ndn-improvements>`_.