diff --git a/source/Ox/js/String.js b/source/Ox/js/String.js
index e510f9a4..1454c5f7 100644
--- a/source/Ox/js/String.js
+++ b/source/Ox/js/String.js
@@ -318,6 +318,7 @@ Ox.parseUserAgent = function(userAgent) {
                 /(Opera) (\d+)/,
                 /(Opera)\/.+Version\/(\d+)/,
                 /(YandexBot)\/(\d+)/,
+                /(YandexMobileBot)\/(\d+)/,
                 /Version\/(\d+).+(Safari)/
             ],
             system: [
diff --git a/source/UI/UI.js b/source/UI/UI.js
index cd134172..2b3620a5 100644
--- a/source/UI/UI.js
+++ b/source/UI/UI.js
@@ -45,7 +45,12 @@ Ox.load.UI = function(options, callback) {
             },
             {
                 name: 'YandexBot',
-                regexp: /(YandexBot)\/(\d+)\./,
+                regexp: /YandexBot\/(\d+)\./,
+                version: 3
+            },
+            {
+                name: 'YandexMobileBot',
+                regexp: /YandexMobileBot\/(\d+)\./,
                 version: 3
             },
             {