diff --git a/History.txt b/History.txt
index 2e2b2e2..7ba6525 100644
--- a/History.txt
+++ b/History.txt
@@ -1,4 +1,9 @@
-0.3.x (In Git)
+0.4.x (In Git)
+
+== 0.4.0 2009-12-23 (The MongoMapper Edition)
+
+ === New features
+  * MongoMapper support for the truncation strategy. (Aubrey Holland)
 
 == 0.3.0 2009-12-20
 
diff --git a/VERSION.yml b/VERSION.yml
index 70b7076..3b48b47 100644
--- a/VERSION.yml
+++ b/VERSION.yml
@@ -1,4 +1,5 @@
 --- 
+:minor: 4
 :patch: 0
+:build: 
 :major: 0
-:minor: 3
diff --git a/database_cleaner.gemspec b/database_cleaner.gemspec
index f35126e..4a95792 100755
--- a/database_cleaner.gemspec
+++ b/database_cleaner.gemspec
@@ -1,11 +1,11 @@
 # Generated by jeweler
-# DO NOT EDIT THIS FILE
-# Instead, edit Jeweler::Tasks in Rakefile, and run `rake gemspec`
+# DO NOT EDIT THIS FILE DIRECTLY
+# Instead, edit Jeweler::Tasks in Rakefile, and run the gemspec command
 # -*- encoding: utf-8 -*-
 
 Gem::Specification.new do |s|
   s.name = %q{database_cleaner}
-  s.version = "0.3.0"
+  s.version = "0.4.0"
 
   s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
   s.authors = ["Ben Mabey"]
@@ -14,7 +14,8 @@ Gem::Specification.new do |s|
   s.email = %q{ben@benmabey.com}
   s.extra_rdoc_files = [
     "LICENSE",
-     "README.textile"
+     "README.textile",
+     "TODO"
   ]
   s.files = [
     "History.txt",
@@ -71,3 +72,4 @@ Gem::Specification.new do |s|
   else
   end
 end
+