diff --git a/index.php b/index.php
index 63d72b8..5578b2d 100644
--- a/index.php
+++ b/index.php
@@ -1,7 +1,6 @@
 <?php
 /*
 TODO :
-- manage SSL detection because if library isn't loaded, some bridge crash !
 - factorize the annotation system
 - factorize to adapter : Format, Bridge, Cache (actually code is almost the same)
 - implement annotation cache for entrance page
@@ -17,6 +16,8 @@ date_default_timezone_set('UTC');
 error_reporting(0);
 //ini_set('display_errors','1'); error_reporting(E_ALL);  // For debugging only.
 
+require_once __DIR__ . '/lib/RssBridge.php';
+
 // extensions check
 if (!extension_loaded('openssl'))
 	die('"openssl" extension not loaded. Please check "php.ini"');
@@ -24,8 +25,6 @@ if (!extension_loaded('openssl'))
 // FIXME : beta test UA spoofing, please report any blacklisting by PHP-fopen-unfriendly websites
 ini_set('user_agent', 'Mozilla/5.0 (X11; Linux x86_64; rv:30.0) Gecko/20121202 Firefox/30.0 (rss-bridge/0.1; +https://github.com/sebsauvage/rss-bridge)');
 
-// -------
-
 // default whitelist
 $whitelist_file = './whitelist.txt';
 $whitelist_default = array(
@@ -59,9 +58,9 @@ else {
 	array_pop($whitelist_selection);
 }
 
+Cache::purge();
 
 try{
-    require_once __DIR__ . '/lib/RssBridge.php';
 
     Bridge::setDir(__DIR__ . '/bridges/');
     Format::setDir(__DIR__ . '/formats/');
diff --git a/lib/Cache.php b/lib/Cache.php
index 9bf8ffa..fa80bc0 100644
--- a/lib/Cache.php
+++ b/lib/Cache.php
@@ -69,4 +69,24 @@ class Cache{
     static public function isValidNameCache($nameCache){
         return preg_match('@^[A-Z][a-zA-Z0-9-]*$@', $nameCache);
     }
-}
\ No newline at end of file
+
+	static public function purge() {
+		$cacheTimeLimit = time() - 60*60*24 ;
+		$cachePath = 'cache';
+		if(file_exists($cachePath)) {
+		   $cacheIterator = new RecursiveIteratorIterator(
+			 new RecursiveDirectoryIterator($cachePath),
+			 RecursiveIteratorIterator::CHILD_FIRST
+		   );
+		   foreach ($cacheIterator as $cacheFile) {
+			  if (in_array($cacheFile->getBasename(), array('.', '..')))
+				 continue;
+			  elseif ($cacheFile->isFile()) {
+				 if( filemtime($cacheFile->getPathname()) < $cacheTimeLimit )
+				    unlink( $cacheFile->getPathname() );
+				 }
+		   }
+		}
+	}
+
+}