diff --git a/more/problem-sets-competitive-programming.md b/more/problem-sets-competitive-programming.md
index 2fffd8a7b..71be712f7 100644
--- a/more/problem-sets-competitive-programming.md
+++ b/more/problem-sets-competitive-programming.md
@@ -3,6 +3,7 @@
 * [Competitive Programming](#competitive-programming)
 * [CTF Capture the Flag](#capture-the-flag)
 * [Data science](#data-science)
+* [HTML and CSS](#html-and-css)
 * [Information security](#information-security)
 * [Problem Sets](#problem-sets)
 
@@ -75,6 +76,11 @@
 * [Kaggle](https://www.kaggle.com)
 
 
+### HTML and CSS
+
+* [Frontend Mentor](https://www.frontendmentor.io/challenges?languages=CSS&sort=difficulty%7Casc&type=free) *(email address requested)*
+
+
 ### Information security
 
 * [ångstromCTF](https://angstromctf.com)