diff --git a/README.md b/README.md
index 2bc33f1..c85cab0 100644
--- a/README.md
+++ b/README.md
@@ -20,12 +20,12 @@ It supports Python 3 and Anki 2.1.
 Installing
 ----------
 
-0. Install Anki. The server currently works well with 2.1.1. Running the server
-   with other versions might work, but things might break, so do it at your own
-   risk. Anki 2.0.x definitely isn't going to work, as it's written in Python 2,
-   whereas `ankisyncd` runs only on Python 3.5 and later. If for some reason
-   you can't get the supported Anki version easily on your system, you can use
-   `anki-bundled` from this repo:
+0. Install Anki. The currently supported version range is 2.1.1〜2.1.3. Running
+   the server with other versions might work, but things might break, so do it
+   at your own risk. Anki 2.0.x definitely isn't going to work, as it's written
+   in Python 2, whereas `ankisyncd` runs only on Python 3.5 and later. If for
+   some reason you can't get the supported Anki version easily on your system,
+   you can use `anki-bundled` from this repo:
 
         $ git submodule update --init
         $ cd anki-bundled
diff --git a/anki-bundled b/anki-bundled
index b5a8d3f..2ff1376 160000
--- a/anki-bundled
+++ b/anki-bundled
@@ -1 +1 @@
-Subproject commit b5a8d3f47c43894d28708b7bd38d20517aba4b41
+Subproject commit 2ff13763369f12a97f531b8a7add345c8c2ade8d