diff --git a/src/main/resources/net/kemitix/pmd/java.xml b/src/main/resources/net/kemitix/pmd/java.xml
index 03f5c25..bc68e99 100644
--- a/src/main/resources/net/kemitix/pmd/java.xml
+++ b/src/main/resources/net/kemitix/pmd/java.xml
@@ -202,7 +202,7 @@ http://pmd.sourceforge.net/ruleset/2.0.0 ">
             <!-- only public and protected methods are required -->
         </properties>
     </rule>
-    <rule ref="category/java/documentation.xml/CommentSize"/>
+    <!--<rule ref="category/java/documentation.xml/CommentSize"/> - doesn't ignore headers, e.g. MIT License -->
     <rule ref="category/java/documentation.xml/UncommentedEmptyConstructor"/>
     <rule ref="category/java/documentation.xml/UncommentedEmptyMethodBody"/>
 
@@ -218,7 +218,7 @@ http://pmd.sourceforge.net/ruleset/2.0.0 ">
     <rule ref="category/java/errorprone.xml/AvoidDecimalLiteralsInBigDecimalConstructor"/>
     <rule ref="category/java/errorprone.xml/AvoidDuplicateLiterals">
         <properties>
-            <property name="maxDuplicateLiterals" value="1"/>
+            <property name="maxDuplicateLiterals" value="2"/>
         </properties>
     </rule>
     <rule ref="category/java/errorprone.xml/AvoidEnumAsIdentifier"/>