diff --git a/mozilla/calendar/install.rdf b/mozilla/calendar/install.rdf
index ec10ca22519..805fe4c5b4d 100644
--- a/mozilla/calendar/install.rdf
+++ b/mozilla/calendar/install.rdf
@@ -24,7 +24,7 @@
         <!-- Thunderbird -->
         <em:id>{3550f703-e582-4d05-9a08-453d09bdfdc6}</em:id>
         <em:minVersion>0.7</em:minVersion>
-        <em:maxVersion>0.7+</em:maxVersion>
+        <em:maxVersion>0.8+</em:maxVersion>
       </Description>
     </em:targetApplication>