diff --git a/README.md b/README.md
index 3a9db02..ad9ac56 100644
--- a/README.md
+++ b/README.md
@@ -1245,9 +1245,7 @@ Checks the formatting of the Javadoc blocks. See the official [Checkstyle docume
 
 #### [JavadocType](http://checkstyle.sourceforge.net/config_javadoc.html#JavadocType)
 
-Checks the format for Javadoc for classes and enums. Javadoc must be present, not have any unknown tags and not missing any `@param` tags.
-
-> TODO: authorFormat = "^.+ (\S+@[\S.]+)$" - name followed by email in brackets
+Checks the format for Javadoc for classes and enums. Javadoc must be present, not have any unknown tags and not missing any `@param` tags. The `@author` tag must have a name and, in brackets, an email address.
 
 #### [JavaNCSS](http://checkstyle.sourceforge.net/config_metrics.html#JavaNCSS)
 
diff --git a/src/main/resources/net/kemitix/checkstyle.xml b/src/main/resources/net/kemitix/checkstyle.xml
index 33329a8..0ccd9a9 100644
--- a/src/main/resources/net/kemitix/checkstyle.xml
+++ b/src/main/resources/net/kemitix/checkstyle.xml
@@ -104,7 +104,9 @@
         </module>
         <module name="JavadocParagraph"/> <!-- javadoc paragraphs have opening <p> elements -->
         <module name="JavadocStyle"/> <!-- javadoc comments are well formed -->
-        <module name="JavadocType"/> <!-- javadoc is present for classes, interfaces and enums -->
+        <module name="JavadocType"> <!-- javadoc is present for classes, interfaces and enums -->
+            <property name="authorFormat" value="^.+ (\S+@[\S.]+)$"/> <!-- name followed by email in brackets -->
+        </module>
         <module name="JavaNCSS"/> <!-- Non-Commenting Source Statements complexity analysis -->
 
         <module name="LeftCurly"/> <!-- placement of left curly braces ('{') for code blocks at end of line -->