diff --git a/Cakefile b/Cakefile
index b3617bc00..76becd648 100644
--- a/Cakefile
+++ b/Cakefile
@@ -94,16 +94,13 @@ task 'upgrade', (options) ->
   {version} = options
   unless version
     return
-  fs.writeFile LATEST, "postMessage({version:'#{version}'},'*')"
-  for file in [CAKEFILE, INFILE]
+  regexp = RegExp VERSION, 'g'
+  for file in [CAKEFILE, INFILE, OUTFILE, LATEST]
     data = fs.readFileSync file, 'utf8'
-    fs.writeFile file, data.replace(/^VERSION = .+/m, "VERSION = '#{version}'")
+    fs.writeFileSync file, data.replace(regexp, version)
   data = fs.readFileSync CHANGELOG, 'utf8'
-  fs.writeFile CHANGELOG, data.replace('master', "master\n\n#{version}")
-  exec 'cake build'
-  exec "git commit -am 'Release #{version}.'"
-  exec "git tag -a #{version} -m '#{version}'"
-  exec "git tag -af stable -m '#{version}'"
+  fs.writeFileSync CHANGELOG, data.replace('master', "master\n\n#{version}")
+  exec "git commit -am 'Release #{version}.' && git tag -a #{version} -m '#{version}' && git tag -af stable -m '#{version}'"
 
 task 'build', ->
   exec 'coffee --print script.coffee', (err, stdout, stderr) ->