diff --git a/README.md b/README.md
index 0cac152..b386c6d 100644
--- a/README.md
+++ b/README.md
@@ -245,6 +245,8 @@ the [browser malware](#browser-malware) section.*
 
 * [NoMoreXOR](https://github.com/hiddenillusion/NoMoreXOR) - Guess a 256 byte
   XOR key using frequency analysis.
+* [unxor](https://github.com/tomchop/unxor/) - Guess XOR keys using
+  known-plaintext attacks.
 * [xortool](https://github.com/hellman/xortool) - Guess XOR key length, as
   well as the key itself.