diff --git a/src/algebra/sieve-of-eratosthenes.md b/src/algebra/sieve-of-eratosthenes.md
index f537ff46a..cc8a2d10c 100644
--- a/src/algebra/sieve-of-eratosthenes.md
+++ b/src/algebra/sieve-of-eratosthenes.md
@@ -271,4 +271,4 @@ However, this algorithm also has its own weaknesses.
 * [SPOJ - Prime Generator](http://www.spoj.com/problems/PRIME1/)
 * [SPOJ - Printing some primes (hard)](http://www.spoj.com/problems/PRIMES2/)
 * [Codeforces - Nodbach Problem](https://codeforces.com/problemset/problem/17/A)
-* [Codefoces - Colliders](https://codeforces.com/problemset/problem/154/B)
+* [Codeforces - Colliders](https://codeforces.com/problemset/problem/154/B)