diff --git a/me.sergiotarxz.Exd.mime.xml b/me.sergiotarxz.Exd.mime.xml
index 917a14d..44cabb3 100644
--- a/me.sergiotarxz.Exd.mime.xml
+++ b/me.sergiotarxz.Exd.mime.xml
@@ -3,6 +3,7 @@
     <mime-type type="application/exd">
         <icon name="me.sergiotarxz.Exd.application-exd"/>
         <comment>Hiperthermia</comment>
+        <sub-class-of type="application/zip"/>
         <glob pattern="*.exd"/>
     </mime-type>
 </mime-info>