diff --git a/application.ini b/application.ini
index d0919ff..419b4a9 100644
--- a/application.ini
+++ b/application.ini
@@ -8,7 +8,7 @@ ID=geierlein@taxbird.de
 
 [Gecko]
 MinVersion=3.5
-MaxVersion=45.*
+MaxVersion=47.*
 
 [XRE]
 EnableExtensionManager=1