diff --git a/README.md b/README.md
index 93878539c32ae8e7030b1c15d37651e41b902879..b68f738eb644b91457be9d28d183bf66b6075f17 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,8 @@
 
 ## Rules
 
+* spellcheck https://github.com/lukeapage/node-markdown-spellcheck
+
 * SI units http://physics.nist.gov/cuu/Units/checklist.html
 
 ```