diff --git a/extensions/readme.md b/extensions/readme.md
index a0966c689..7fb87e5cf 100644
--- a/extensions/readme.md
+++ b/extensions/readme.md
@@ -2,7 +2,7 @@
 
 Use subfolders under the `extensions` folder to house extensions to the final unified hosts file.
 
-Currently this repo includes four extensions: 
+Currently, this repo includes four extensions:
 
 * `gambling` for common online betting sites,
 * `social` for common social media sites,