diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ba2bfc52d3..060a3bd91d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -48,7 +48,7 @@ We only accept issues that are bug reports or feature requests. Bugs must be iso
 - Multiple-line approach (one property and value per line)
 - Always a space after a property's colon (.e.g, `display: block;` and not `display:block;`)
 - End all lines with a semi-colon
-- For multiple, comma-separated selectors, place each selector on it's own line
+- For multiple, comma-separated selectors, place each selector on its own line
 - Attribute selectors, like `input[type="text"]` should always wrap the attribute's value in double quotes, for consistency and safety (see this [blog post on unquoted attribute values](http://mathiasbynens.be/notes/unquoted-attribute-values) that can lead to XSS attacks).
 
 ### JS