diff --git a/xml/dtd/common.xsd b/xml/dtd/common.xsd
index c8654dd..379c2bc 100644
--- a/xml/dtd/common.xsd
+++ b/xml/dtd/common.xsd
@@ -99,7 +99,7 @@
         <xs:element ref="invoice_mail"/>
         <xs:element ref="invoice_extra_field" minOccurs="0"/>
         <xs:element ref="vat_no"/>
-        <xs:element ref="rates"/>
+        <xs:element ref="rates" minOccurs="0"/>
       </xs:sequence>
       <xs:attribute ref="xml:base"/>
       <xs:attribute ref="xml:lang"/>
diff --git a/xml/dtd/pentestreport.xsd b/xml/dtd/pentestreport.xsd
index 1fd2c1a..9efae9b 100644
--- a/xml/dtd/pentestreport.xsd
+++ b/xml/dtd/pentestreport.xsd
@@ -309,6 +309,7 @@
         <xs:element name="img"/>
         <xs:element name="table"/>
         <xs:element ref="pre"/>
+        <xs:group ref="placeholders"/>
       </xs:choice>
     </xs:complexType>
   </xs:element>
@@ -328,6 +329,7 @@
         <xs:element name="img"/>
         <xs:element name="table"/>
         <xs:element ref="pre"/>
+        <xs:group ref="placeholders"/>
       </xs:choice>
     </xs:complexType>
   </xs:element>
@@ -341,6 +343,7 @@
         <xs:element name="img"/>
         <xs:element name="table"/>
         <xs:element ref="pre"/>
+        <xs:group ref="placeholders"/>
       </xs:choice>
     </xs:complexType>
   </xs:element>
@@ -353,6 +356,7 @@
         <xs:element name="img"/>
         <xs:element name="table"/>
         <xs:element ref="pre"/>
+        <xs:group ref="placeholders"/>
       </xs:choice>
     </xs:complexType>
   </xs:element>
@@ -383,6 +387,8 @@
       <xs:element name="p_testingduration"/>
       <xs:element name="p_reportwritingduration"/>
       <xs:element name="p_reportdue"/>
+      <xs:element name="p_startdate"/>
+      <xs:element name="p_enddate"/>
       <xs:element name="finding_count">
         <xs:complexType>
           <xs:attribute ref="threatLevel" use="optional"/>