diff --git a/core_js/write_version.js b/core_js/write_version.js
index d0f2307..a8dabda 100644
--- a/core_js/write_version.js
+++ b/core_js/write_version.js
@@ -2,5 +2,5 @@
  * This file writes only the version into every page.
  * @return version
  */
-var version = "1.2.1.1";
+var version = browser.runtime.getManifest().version;
 $('#version').text(version);