diff --git a/platform/firefox/install.rdf b/platform/firefox/install.rdf
index 316af56..755ed3b 100644
--- a/platform/firefox/install.rdf
+++ b/platform/firefox/install.rdf
@@ -21,7 +21,7 @@
             <r:Description>
                 <id>{{ec8030f7-c20a-464f-9b0e-13a3a9e97384}}</id>
                 <minVersion>35.0</minVersion>
-                <maxVersion>41.0</maxVersion>
+                <maxVersion>42.0</maxVersion>
             </r:Description>
         </targetApplication>
     </r:Description>