diff --git a/website/agenda/templates/calendar_colo.html b/website/agenda/templates/calendar_colo.html
index 7725918..23ba0c7 100644
--- a/website/agenda/templates/calendar_colo.html
+++ b/website/agenda/templates/calendar_colo.html
@@ -4,7 +4,7 @@
 <!DOCTYPE html>
 <html>
 	<head>
-		<meta http-equiv="expires" content="36000">
+		<meta http-equiv="expires" content="">
 		<meta http-equiv="Content-Script-Type" content="javascript" />
 		<meta http-equiv="Content-Style-Type" content="text/css" />
 		<title>Calendar <TMPL_VAR project_title></title>
