diff --git a/13 HTTP Caching.md b/12 HTTP Caching.md
similarity index 96%
rename from 13 HTTP Caching.md
rename to 12 HTTP Caching.md
index a3f2367..460866c 100644
--- a/13 HTTP Caching.md	
+++ b/12 HTTP Caching.md	
@@ -2,7 +2,7 @@ Flight provides built-in support for HTTP level caching. If the caching conditio
 Flight will return an HTTP `304 Not Modified` response. The next time the client requests the same resource,
 they will be prompted to use their locally cached version.
 
-## Last-Modified
+### Last-Modified
 
 You can use the `lastModified` method and pass in a UNIX timestamp to set the date and time a page was last modified.
 The client will continue to use their cache until the last modified value is changed.
@@ -12,7 +12,7 @@ The client will continue to use their cache until the last modified value is cha
         echo 'This content will be cached.';
     });
 
-## ETag
+### ETag
 
 ETag caching is similar to Last-Modified, except you can specify any id you want for the resource: