diff --git a/helpers/make-firefox b/helpers/make-firefox
index b9aafb5..938d1e1 100644
--- a/helpers/make-firefox
+++ b/helpers/make-firefox
@@ -18,7 +18,7 @@
 #    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 #
 
-VERSION=39
+VERSION=40
 
 . ./config