diff --git a/build/additional-extensions.json b/build/additional-extensions.json
index bb96f0c18add..7e9abda527b4 100644
--- a/build/additional-extensions.json
+++ b/build/additional-extensions.json
@@ -1,5 +1,5 @@
 {
   "Screen Reader Simulator": {
-    "url" : "https://addons.mozilla.org/firefox/downloads/file/212340/screen_reader_simulator-0.2-fx.xpi"
+    "url" : "https://addons.mozilla.org/firefox/downloads/file/212340/screen_reader_simulator-0.4-fx.xpi"
   }
 }