diff --git a/checkstyle.xml b/checkstyle.xml
index 045d523..c861841 100644
--- a/checkstyle.xml
+++ b/checkstyle.xml
@@ -84,6 +84,7 @@
 
 	<!-- 11. File tabs/spaces: require no raw tabs etc -->
 	<module name="FileTabCharacter">
+        <property name="severity" value="warning" />
 		<property name="eachLine" value="true"/>
 	</module>