diff --git a/core/js/js.js b/core/js/js.js
index 597ca2af9af7c10d1527a7cfb304547da4e77f36..4016f64d601ab5c6dbbfd6f5384fd248a2af5449 100644
--- a/core/js/js.js
+++ b/core/js/js.js
@@ -827,6 +827,6 @@ function sessionHeartBeat(){
 		setInterval(function(){
 			var url = OC.Router.generate('heartbeat');
 			$.post(url);
-		}, 15000);
+		}, 900000);
 	});
 }
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