diff --git a/README.md b/README.md
index c002b66..b3a79a1 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,13 @@ developers know where to find good information!
 2. Optionally install [Ruby](https://rvm.io/rvm/install/) with [Jekyll](https://github.com/mojombo/jekyll/) gem to preview locally
 3. Submit pull request for consideration
 
+### Contributor Style Guide
+
+1. Use American English spelling (*primary English repo only*)
+2. Use four (4) spaces to indent text; do not use tabs.
+3. Wrap all text to 120 characters.
+4. Code samples should adhere to PSR-1 or higher.
+
 ## Where
 
 <http://www.phptherightway.com>