diff --git a/README.md b/README.md
index cb7e874..c73d58b 100644
--- a/README.md
+++ b/README.md
@@ -11,5 +11,6 @@ You can not append native blobs to a BlobBuilder.js `BlobBuilder` unless the scr
 a web worker thread, as the necessary `FileReaderSync` interface for reading native blobs
 is limited to web worker threads only.
 
+![Tracking image](//in.getclicky.com/212712ns.gif)
 
-  [1]: http://www.w3.org/TR/file-writer-api/#the-blobbuilder-interface
\ No newline at end of file
+  [1]: http://www.w3.org/TR/file-writer-api/#the-blobbuilder-interface