assets/puzzles.xsd in pdd-0.20 vs assets/puzzles.xsd in pdd-0.20.1

@@ -82,10 +82,10 @@
         </xs:simpleType>
       </xs:element>
       <xs:element name="email" minOccurs="0">
         <xs:simpleType>
           <xs:restriction base="xs:string">
-            <xs:pattern value=".+"/>
+            <xs:pattern value="[^@]+@[^\.]+\..+"/>
           </xs:restriction>
         </xs:simpleType>
       </xs:element>
       <xs:element name="time" minOccurs="0" type="xs:dateTime"/>
     </xs:all>