diff --git a/README.md b/README.md
index ac6d496..93cfcb4 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 
 # gatsby-plugin-robots-txt
 
-> Create `robots.txt` for your Gatsby site.
+> Create `robots.txt` for your Gatsby site on build.
 
 ## Install