diff --git a/get-started/part3.md b/get-started/part3.md
index 9a1436f571..4d1c85ec40 100644
--- a/get-started/part3.md
+++ b/get-started/part3.md
@@ -41,7 +41,7 @@ must go one level up in the hierarchy of a distributed application: the
 
 ## About services
 
-In a distributed application, different pieces of the app are called "services."
+In a distributed application, different pieces of the app are called "services".
 For example, if you imagine a video sharing site, it probably includes a service
 for storing application data in a database, a service for video transcoding in
 the background after a user uploads something, a service for the front-end, and