diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
index 9fb4286..073fdbf 100644
--- a/config/checkstyle/checkstyle.xml
+++ b/config/checkstyle/checkstyle.xml
@@ -1,83 +1,83 @@
 <?xml version="1.0"?>
-<!--
-  ~ jndn-mock
-  ~ Copyright (c) 2016, Intel Corporation.
-  ~
-  ~ This program is free software; you can redistribute it and/or modify it
-  ~ under the terms and conditions of the GNU Lesser General Public License,
-  ~ version 3, as published by the Free Software Foundation.
-  ~
-  ~ This program is distributed in the hope it will be useful, but WITHOUT ANY
-  ~ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-  ~ FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
-  ~ more details.
-  -->
-
 <!DOCTYPE module PUBLIC
-          "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
-          "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">
+          "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+          "https://checkstyle.org/dtds/configuration_1_3.dtd">
 
 <!--
 
-  Based on http://checkstyle.sourceforge.net/sun_style.html, the
   Checkstyle configuration that checks the sun coding conventions from:
 
     - the Java Language Specification at
-      http://java.sun.com/docs/books/jls/second_edition/html/index.html
+      https://docs.oracle.com/javase/specs/jls/se11/html/index.html
 
-    - the Sun Code Conventions at http://java.sun.com/docs/codeconv/
+    - the Sun Code Conventions at https://www.oracle.com/java/technologies/javase/codeconventions-contents.html
 
     - the Javadoc guidelines at
-      http://java.sun.com/j2se/javadoc/writingdoccomments/index.html
+      https://www.oracle.com/technical-resources/articles/java/javadoc-tool.html
 
-    - the JDK Api documentation http://java.sun.com/j2se/docs/api/index.html
+    - the JDK Api documentation https://docs.oracle.com/en/java/javase/11/
 
     - some best practices
 
   Checkstyle is very configurable. Be sure to read the documentation at
-  http://checkstyle.sourceforge.net (or in your downloaded distribution).
+  https://checkstyle.org (or in your downloaded distribution).
 
   Most Checks are configurable, be sure to consult the documentation.
 
   To completely disable a check, just comment it out or delete it from the file.
+  To suppress certain violations please review suppression filters.
 
   Finally, it is worth reading the documentation.
 
 -->
 
 <module name="Checker">
-    <!--
-        If you set the basedir property below, then all reported file
-        names will be relative to the specified directory. See
-        http://checkstyle.sourceforge.net/5.x/config.html#Checker
+  <!--
+      If you set the basedir property below, then all reported file
+      names will be relative to the specified directory. See
+      https://checkstyle.org/config.html#Checker
 
-        <property name="basedir" value="${basedir}"/>
-    -->
+      <property name="basedir" value="${basedir}"/>
+  -->
+  <property name="severity" value="error"/>
 
-    <property name="fileExtensions" value="java, properties, xml"/>
+  <property name="fileExtensions" value="java, properties, xml"/>
+
+  <!-- Excludes all 'module-info.java' files              -->
+  <!-- See https://checkstyle.org/config_filefilters.html -->
+  <module name="BeforeExecutionExclusionFileFilter">
+    <property name="fileNamePattern" value="module\-info\.java$"/>
+  </module>
+
+  <!-- https://checkstyle.org/config_filters.html#SuppressionFilter -->
+  <module name="SuppressionFilter">
+    <property name="file" value="${org.checkstyle.sun.suppressionfilter.config}"
+              default="checkstyle-suppressions.xml" />
+    <property name="optional" value="true"/>
+  </module>
 
     <!-- Checks that a package-info.java file exists for each package.     -->
-    <!-- See http://checkstyle.sourceforge.net/config_javadoc.html#JavadocPackage -->
-    <module name="JavadocPackage"/>
+    <!-- See https://checkstyle.org/config_javadoc.html#JavadocPackage -->
+    <!-- <module name="JavadocPackage"/> -->
 
     <!-- Checks whether files end with a new line.                        -->
-    <!-- See http://checkstyle.sourceforge.net/config_misc.html#NewlineAtEndOfFile -->
+    <!-- See https://checkstyle.org/config_misc.html#NewlineAtEndOfFile -->
     <module name="NewlineAtEndOfFile"/>
 
     <!-- Checks that property files contain the same keys.         -->
-    <!-- See http://checkstyle.sourceforge.net/config_misc.html#Translation -->
+    <!-- See https://checkstyle.org/config_misc.html#Translation -->
     <module name="Translation"/>
 
     <!-- Checks for Size Violations.                    -->
-    <!-- See http://checkstyle.sourceforge.net/config_sizes.html -->
+    <!-- See https://checkstyle.org/config_sizes.html -->
     <module name="FileLength"/>
 
     <!-- Checks for whitespace                               -->
-    <!-- See http://checkstyle.sourceforge.net/config_whitespace.html -->
+    <!-- See https://checkstyle.org/config_whitespace.html -->
     <module name="FileTabCharacter"/>
 
     <!-- Miscellaneous other checks.                   -->
-    <!-- See http://checkstyle.sourceforge.net/config_misc.html -->
+    <!-- See https://checkstyle.org/config_misc.html -->
     <module name="RegexpSingleline">
        <property name="format" value="\s+$"/>
        <property name="minimum" value="0"/>
@@ -86,7 +86,7 @@
     </module>
 
     <!-- Checks for Headers                                -->
-    <!-- See http://checkstyle.sourceforge.net/config_header.html   -->
+    <!-- See https://checkstyle.org/config_header.html   -->
     <!-- <module name="Header"> -->
     <!--   <property name="headerFile" value="${checkstyle.header.file}"/> -->
     <!--   <property name="fileExtensions" value="java"/> -->
@@ -95,20 +95,18 @@
     <module name="TreeWalker">
 
         <!-- Checks for Javadoc comments.                     -->
-        <!-- See http://checkstyle.sourceforge.net/config_javadoc.html -->
-        <module name="JavadocMethod">
-            <property name="excludeScope" value="private"/>
-        </module>
-        <module name="JavadocType">
-            <property name="excludeScope" value="private"/>
-        </module>
+        <!-- See https://checkstyle.org/config_javadoc.html -->
+        <module name="InvalidJavadocPosition"/>
+        <module name="JavadocMethod"/>
+        <module name="JavadocType"/>
         <module name="JavadocVariable">
             <property name="excludeScope" value="private"/>
         </module>
         <module name="JavadocStyle"/>
+        <!-- <module name="MissingJavadocMethod"/> -->
 
         <!-- Checks for Naming Conventions.                  -->
-        <!-- See http://checkstyle.sourceforge.net/config_naming.html -->
+        <!-- See https://checkstyle.org/config_naming.html -->
         <module name="ConstantName"/>
         <module name="LocalFinalVariableName"/>
         <module name="LocalVariableName"/>
@@ -120,7 +118,7 @@
         <module name="TypeName"/>
 
         <!-- Checks for imports                              -->
-        <!-- See http://checkstyle.sourceforge.net/config_import.html -->
+        <!-- See https://checkstyle.org/config_imports.html -->
         <module name="AvoidStarImport"/>
         <module name="IllegalImport"/> <!-- defaults to sun.* packages -->
         <module name="RedundantImport"/>
@@ -129,7 +127,7 @@
         </module>
 
         <!-- Checks for Size Violations.                    -->
-        <!-- See http://checkstyle.sourceforge.net/config_sizes.html -->
+        <!-- See https://checkstyle.org/config_sizes.html -->
         <module name="LineLength">
             <property name="max" value="120"/>
         </module>
@@ -137,7 +135,7 @@
         <module name="ParameterNumber"/>
 
         <!-- Checks for whitespace                               -->
-        <!-- See http://checkstyle.sourceforge.net/config_whitespace.html -->
+        <!-- See https://checkstyle.org/config_whitespace.html -->
         <module name="EmptyForIteratorPad"/>
         <module name="GenericWhitespace"/>
         <module name="MethodParamPad"/>
@@ -152,12 +150,12 @@
         <module name="WhitespaceAround"/>
 
         <!-- Modifier Checks                                    -->
-        <!-- See http://checkstyle.sourceforge.net/config_modifiers.html -->
+        <!-- See https://checkstyle.org/config_modifiers.html -->
         <module name="ModifierOrder"/>
         <module name="RedundantModifier"/>
 
         <!-- Checks for blocks. You know, those {}'s         -->
-        <!-- See http://checkstyle.sourceforge.net/config_blocks.html -->
+        <!-- See https://checkstyle.org/config_blocks.html -->
         <module name="AvoidNestedBlocks"/>
         <module name="EmptyBlock"/>
         <module name="LeftCurly"/>
@@ -165,7 +163,7 @@
         <module name="RightCurly"/>
 
         <!-- Checks for common coding problems               -->
-        <!-- See http://checkstyle.sourceforge.net/config_coding.html -->
+        <!-- See https://checkstyle.org/config_coding.html -->
         <module name="AvoidInlineConditionals"/>
         <module name="EmptyStatement"/>
         <module name="EqualsHashCode"/>
@@ -174,26 +172,34 @@
         <module name="InnerAssignment"/>
         <module name="MagicNumber"/>
         <module name="MissingSwitchDefault"/>
+        <module name="MultipleVariableDeclarations"/>
         <module name="SimplifyBooleanExpression"/>
         <module name="SimplifyBooleanReturn"/>
 
         <!-- Checks for class design                         -->
-        <!-- See http://checkstyle.sourceforge.net/config_design.html -->
-        <!--<module name="DesignForExtension"/>-->
+        <!-- See https://checkstyle.org/config_design.html -->
+        <!-- <module name="DesignForExtension"/> -->
         <module name="FinalClass"/>
         <module name="HideUtilityClassConstructor"/>
         <module name="InterfaceIsType"/>
         <module name="VisibilityModifier">
-            <property name="publicMemberPattern" value="^(on|sent).*$"/>
+            <property name="allowPublicFinalFields" value="true"/>
         </module>
 
         <!-- Miscellaneous other checks.                   -->
-        <!-- See http://checkstyle.sourceforge.net/config_misc.html -->
+        <!-- See https://checkstyle.org/config_misc.html -->
         <module name="ArrayTypeStyle"/>
-        <module name="FinalParameters"/>
-        <!--<module name="TodoComment"/>-->
+        <!-- <module name="FinalParameters"/> -->
+        <!-- <module name="TodoComment"/> -->
         <module name="UpperEll"/>
 
+    <!-- https://checkstyle.org/config_filters.html#SuppressionXpathFilter -->
+    <module name="SuppressionXpathFilter">
+      <property name="file" value="${org.checkstyle.sun.suppressionxpathfilter.config}"
+                default="checkstyle-xpath-suppressions.xml" />
+      <property name="optional" value="true"/>
+    </module>
+
     </module>
 
 </module>