diff --git a/CHANGES.md b/CHANGES.md
index e5d0d1e..40d50b8 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,9 @@
 # mustache.js Changes
 
+## 0.3.1-dev-twitter-b (8/23/2011)
+
+* Cached regexes for improved performance
+
 ## 0.3.1-dev-twitter (12/3/2010)
 
 * fixed double-rendering bug
diff --git a/mustache.js b/mustache.js
index 264acc9..8f58683 100644
--- a/mustache.js
+++ b/mustache.js
@@ -377,7 +377,7 @@ var Mustache = function() {
 
   return({
     name: "mustache.js",
-    version: "0.3.1-dev-twitter",
+    version: "0.3.1-dev-twitter-b",
 
     /*
       Turns a template and view into HTML