update version to 2.9.1
diff --git a/CHANGES.md b/CHANGES.md
index 1cd02e6..db83f97 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,10 @@
+Version 2.9.1 released 2014-09-29
+
+* Fix Makefile rule for building docs
+  https://github.com/mochi/mochiweb/issues/135
+* Minimize gen_tcp:send calls to optimize performance.
+  https://github.com/mochi/mochiweb/pull/137
+
 Version 2.9.0 released 2014-06-24
 
 * Increased timeout in test suite for FreeBSD
diff --git a/src/mochiweb.app.src b/src/mochiweb.app.src
index 7c98141..2c6dc94 100644
--- a/src/mochiweb.app.src
+++ b/src/mochiweb.app.src
@@ -1,7 +1,7 @@
 %% This is generated from src/mochiweb.app.src
 {application, mochiweb,
  [{description, "MochiMedia Web Server"},
-  {vsn, "2.9.0"},
+  {vsn, "2.9.1"},
   {modules, []},
   {registered, []},
   {env, []},