diff --git a/more/problem-sets-competitive-programming.md b/more/problem-sets-competitive-programming.md
index 7158a383d..2cee1b930 100644
--- a/more/problem-sets-competitive-programming.md
+++ b/more/problem-sets-competitive-programming.md
@@ -48,6 +48,7 @@
 * [Techgig](https://www.techgig.com)
 * [Topcoder](https://www.topcoder.com)
 * [Toph](https://toph.co)
+* [USACO.guide](https://usaco.guide)
 
 
 ### Capture the flag