diff --git a/mozmill/extension/install.rdf b/mozmill/extension/install.rdf
index 77fe0722..63710029 100755
--- a/mozmill/extension/install.rdf
+++ b/mozmill/extension/install.rdf
@@ -12,7 +12,7 @@
        <Description>
          <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
          <em:minVersion>3.0</em:minVersion>
-         <em:maxVersion>3.7a1pre</em:maxVersion>
+         <em:maxVersion>4.*</em:maxVersion>
        </Description>
      </em:targetApplication>
      <em:targetApplication>