diff --git a/application.ini b/application.ini
index 7d6a9da..e7b8c20 100644
--- a/application.ini
+++ b/application.ini
@@ -8,7 +8,7 @@ ID=geierlein@taxbird.de
 
 [Gecko]
 MinVersion=3.5
-MaxVersion=39.*
+MaxVersion=40.*
 
 [XRE]
 EnableExtensionManager=1