diff --git a/src/SoapActions.php b/src/SoapActions.php
index <HASH>..<HASH> 100644
--- a/src/SoapActions.php
+++ b/src/SoapActions.php
@@ -70,7 +70,7 @@ class SoapActions {
         }
 
         $cache = $this->client->cache;
-        $cache->set( $service . "_soap_actions", $soapActions );
+        $cache->set( $service . "_soap_actions", $soapActions, 4*7*24*60*60 ); // four weeks
     }
 
     /**
Cache WSDL operations for an extended amount of time