diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/authorities/authorities.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/authorities/authorities.tt
index ebca79dbdf..947821c647 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/authorities/authorities.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/authorities/authorities.tt
@@ -52,7 +52,7 @@
             var strQuery = GetZ3950Terms();
             var index = "&index=[% index | html %]";
             if(strQuery){
-                window.open("/cgi-bin/koha/cataloguing/z3950_auth_search.pl?authid=[% authid | html %]"+strQuery+index,"z3950search",'width=740,height=450,location=yes,toolbar=no,scrollbars=yes,resize=yes');
+                window.open("/cgi-bin/koha/cataloguing/z3950_auth_search.pl?authid=[% authid | html %]"+strQuery+index,"z3950search",'width=800,height=500,location=yes,toolbar=no,scrollbars=yes,resize=yes');
             }
             return false;
         });