diff --git a/install.rdf b/install.rdf
index 6600170cb7..aec77e6ed7 100644
--- a/install.rdf
+++ b/install.rdf
@@ -25,7 +25,7 @@
       <Description>
         <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
         <em:minVersion>31.0</em:minVersion>
-        <em:maxVersion>39.*</em:maxVersion>
+        <em:maxVersion>40.*</em:maxVersion>
       </Description>
     </em:targetApplication>
     
diff --git a/update.rdf b/update.rdf
index eb1a3559a4..d95922de25 100644
--- a/update.rdf
+++ b/update.rdf
@@ -12,7 +12,7 @@
             <RDF:Description>
               <id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</id>
               <minVersion>31.0</minVersion>
-              <maxVersion>39.*</maxVersion>
+              <maxVersion>40.*</maxVersion>
               <updateLink>http://download.zotero.org/extension/zotero.xpi</updateLink>
               <updateHash>sha1:</updateHash>
             </RDF:Description>