diff --git a/lib/SimpleSAML/Utils/HTTP.php b/lib/SimpleSAML/Utils/HTTP.php
index 03b4d1bab3dfa211614ff08c78c11a396eab5e00..d96ed81a1863a9dc7b4534088c707244ef22a0a4 100644
--- a/lib/SimpleSAML/Utils/HTTP.php
+++ b/lib/SimpleSAML/Utils/HTTP.php
@@ -176,7 +176,7 @@ class HTTP
 
             // disable caching of this response
             header('Pragma: no-cache');
-            header('Cache-Control: no-cache, must-revalidate');
+            header('Cache-Control: no-cache, no-store, must-revalidate');
         }
 
         // show a minimal web page with a clickable link to the URL