diff --git a/_CodingChallenges/156-pi-digits.md b/_CodingChallenges/156-pi-digits.md
index 1a517f6b9f..9772c6fdef 100644
--- a/_CodingChallenges/156-pi-digits.md
+++ b/_CodingChallenges/156-pi-digits.md
@@ -55,5 +55,11 @@ contributions:
       url: "https://github.com/praaatik"
     url: "https://shrouded-springs-15406.herokuapp.com/"
     source: "https://github.com/praaatik/pi-peekaboo"
+  - title: "2Pi a.k.a Tau"
+    author:
+      name: "Amninder Singh"
+      url: "https://github.com/amnindersingh12/"
+    url: "https://amnindersingh12.github.io/two-pie/"
+    source: "https://github.com/amnindersingh12/two-pie"
 ---
 🥧 Happy Pi Day 2020! In this challenge, I build a simple web application using p5.js and node.js to search in the first billion digits of Pi.