diff --git a/ag/include/clan.inc.php b/ag/include/clan.inc.php
index 3ff1c5f..c0096f6 100644
--- a/ag/include/clan.inc.php
+++ b/ag/include/clan.inc.php
@@ -8,6 +8,7 @@
 
 include_once (ROOT_PATH . '/include/defines.inc.php');
 include_once (ROOT_PATH . '/include/clan_fights.inc.php');
+include_once (ROOT_PATH . '/include/exp.inc.php');
 
 defineIfNotDefined('MAX_CHARS_CLANSIGN', 8);
 $GLOBALS['clan_buffered_instances'] = array ();
@@ -87,10 +88,14 @@ function getMaximumMembers($clanid) {
 }
 
 function getRequiredClanExp($level) {
-	return pow(2, $level) * 10;
+	//return pow(2, $level) * 10;
+	$level = $level + 1; 
+	// 12,5*(neuesLevel)^2-22,5*(neues Level)+10
+	$value = 12.5 * pow($level, 2) - 22.5 * $level + 10;
+	$value = beautifyNumericValue($value, 5);	
+	return $value;
 }
 
-
 function revokeInvitation($user, $userid, $clan = NULL){
 	if($user['clan'] === NULL) {
 		return 'Du bist in keinem Clan!';