diff --git a/README.md b/README.md
index 8d990d0..9ad3a38 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,8 @@ SmartMarker.moveMarkerSmoothly(mapboxMarker, location)
 ```
 
 ### Location Extension
-I create location extensions for get your location every second with old location and new location (delay 30 millisecond)
+I create location extensions for get your location every second with old location and new location (delay 30 millisecond).
+Thanks [@Patloew](https://github.com/patloew) for [ReactiveLocation](https://github.com/patloew/RxLocation).
 ```kotlin
 // define location watcher
 val locationWatcher: LocationWatcher = LocationWatcher(context)