diff --git a/Rakefile b/Rakefile
index 3f34c04..bd765a2 100644
--- a/Rakefile
+++ b/Rakefile
@@ -21,8 +21,10 @@ end
 
 desc "Generate documentation"
 task :rdoc do
-  FileUtils.rm_rf('html')
-  system "rdoc --main README.rdoc --op html --inline-source --quiet README.rdoc `find lib -name '*.rb'`"
+  version = eval(File.read("mongo-ruby-driver.gemspec")).version
+  out = File.join('html', version.to_s)
+  FileUtils.rm_rf(out)
+  system "rdoc --main README.rdoc --op #{out} --inline-source --quiet README.rdoc `find lib -name '*.rb'`"
 end
 
 desc "Publish documentation to mongo.rubyforge.org"