diff --git a/problem-sets-competitive-programming.md b/problem-sets-competitive-programming.md
index 421ffb48..81caab31 100644
--- a/problem-sets-competitive-programming.md
+++ b/problem-sets-competitive-programming.md
@@ -62,6 +62,8 @@
 
 * [ångstromCTF](https://angstromctf.com)
 * [CTFtime](https://ctftime.org)
+* [Hacker101](https://ctf.hacker101.com)
+* [InCTF](https://inctf.in)
 
 
 ### Problem Sets