diff --git a/index.md b/index.md
index 8611051..71485b0 100644
--- a/index.md
+++ b/index.md
@@ -31,7 +31,7 @@ var fun = function lang(l) {
 ```
 
 ```ruby
-# Ruby code with syntax highlighting
+# Ruby code with syntax highlighting.
 GitHubPages::Dependencies.gems.each do |gem, version|
   s.add_dependency(gem, "= #{version}")
 end