diff --git a/index.html b/index.html
index ff2a9b4..542834f 100644
--- a/index.html
+++ b/index.html
@@ -111,7 +111,7 @@ <h2>Extensibility</h2>
 
   <p>A document object model (DOM) is an in-memory representation of various types of {{Node}}s
   where each {{Node}} is connected in a tree. The [[HTML]] and [[DOM]] specifications describe
-  DOM and its {{Node}}s is greater detail.
+  DOM and its {{Node}}s in greater detail.
 
   <p><dfn>Parsing</dfn> is the term used for converting a string representation of a DOM into an
   actual DOM, and <dfn>Serializing</dfn> is the term used to transform a DOM back into a string.