diff --git a/perftools.rb.gemspec b/perftools.rb.gemspec
index 7194968..0e164be 100644
--- a/perftools.rb.gemspec
+++ b/perftools.rb.gemspec
@@ -1,6 +1,6 @@
 spec = Gem::Specification.new do |s|
   s.name = 'perftools.rb'
-  s.version = '0.5.2'
+  s.version = '0.5.3'
   s.date = '2010-11-12'
   s.rubyforge_project = 'perftools-rb'
   s.summary = 'google-perftools for ruby code'