diff --git a/config/suppressions.xml b/config/suppressions.xml
index b8204d3a6..347590eca 100644
--- a/config/suppressions.xml
+++ b/config/suppressions.xml
@@ -34,7 +34,7 @@
     <!-- we can not change it as, Check name is part of API (used in configurations) -->
     <suppress checks="AbbreviationAsWordInName"
               files="XMLLogger.java"
-              lines="43"/>
+              lines="44"/>
     <!-- test should be named as their main class -->
     <suppress checks="AbbreviationAsWordInName"
               files="XMLLoggerTest.java"
diff --git a/pom.xml b/pom.xml
index 92ef45238..cefe13709 100644
--- a/pom.xml
+++ b/pom.xml
@@ -965,15 +965,15 @@
       <plugin>
       <groupId>de.thetaphi</groupId>
       <artifactId>forbiddenapis</artifactId>
-      <version>2.0</version>
+      <version>2.1</version>
       <configuration>
         <targetVersion>${java.version}</targetVersion>
-        <internalRuntimeForbidden>true</internalRuntimeForbidden>
         <failOnUnsupportedJava>false</failOnUnsupportedJava>
         <bundledSignatures>
           <bundledSignature>jdk-unsafe</bundledSignature>
           <bundledSignature>jdk-deprecated</bundledSignature>
           <bundledSignature>jdk-system-out</bundledSignature>
+          <bundledSignature>jdk-non-portable</bundledSignature>
         </bundledSignatures>
         <excludes>
           <!-- system-out is ok there, that is CLI -->
diff --git a/src/main/java/com/puppycrawl/tools/checkstyle/XMLLogger.java b/src/main/java/com/puppycrawl/tools/checkstyle/XMLLogger.java
index 1fd69d78a..ed6fbb784 100644
--- a/src/main/java/com/puppycrawl/tools/checkstyle/XMLLogger.java
+++ b/src/main/java/com/puppycrawl/tools/checkstyle/XMLLogger.java
@@ -24,6 +24,7 @@ import java.io.OutputStreamWriter;
 import java.io.PrintWriter;
 import java.io.StringWriter;
 import java.nio.charset.StandardCharsets;
+import java.util.Locale;
 import java.util.ResourceBundle;
 
 import com.puppycrawl.tools.checkstyle.api.AuditEvent;
@@ -84,7 +85,7 @@ public class XMLLogger
         writer.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
 
         final ResourceBundle compilationProperties =
-            ResourceBundle.getBundle("checkstylecompilation");
+            ResourceBundle.getBundle("checkstylecompilation", Locale.ROOT);
         final String version =
             compilationProperties.getString("checkstyle.compile.version");
 
diff --git a/src/main/java/com/puppycrawl/tools/checkstyle/ant/CheckstyleAntTask.java b/src/main/java/com/puppycrawl/tools/checkstyle/ant/CheckstyleAntTask.java
index 0478dacf7..b3d507258 100644
--- a/src/main/java/com/puppycrawl/tools/checkstyle/ant/CheckstyleAntTask.java
+++ b/src/main/java/com/puppycrawl/tools/checkstyle/ant/CheckstyleAntTask.java
@@ -283,7 +283,7 @@ public class CheckstyleAntTask extends Task {
         try {
             // output version info in debug mode
             final ResourceBundle compilationProperties = ResourceBundle
-                    .getBundle("checkstylecompilation");
+                    .getBundle("checkstylecompilation", Locale.ROOT);
             final String version = compilationProperties
                     .getString("checkstyle.compile.version");
             final String compileTimestamp = compilationProperties
diff --git a/src/main/java/com/puppycrawl/tools/checkstyle/utils/TokenUtils.java b/src/main/java/com/puppycrawl/tools/checkstyle/utils/TokenUtils.java
index f1594b4be..13b39a18d 100644
--- a/src/main/java/com/puppycrawl/tools/checkstyle/utils/TokenUtils.java
+++ b/src/main/java/com/puppycrawl/tools/checkstyle/utils/TokenUtils.java
@@ -20,6 +20,7 @@
 package com.puppycrawl.tools.checkstyle.utils;
 
 import java.lang.reflect.Field;
+import java.util.Locale;
 import java.util.ResourceBundle;
 
 import com.google.common.collect.ImmutableMap;
@@ -150,7 +151,7 @@ public final class TokenUtils {
 
         final String tokenTypes =
             "com.puppycrawl.tools.checkstyle.api.tokentypes";
-        final ResourceBundle bundle = ResourceBundle.getBundle(tokenTypes);
+        final ResourceBundle bundle = ResourceBundle.getBundle(tokenTypes, Locale.ROOT);
         return bundle.getString(name);
     }
 
diff --git a/src/test/java/com/puppycrawl/tools/checkstyle/MainTest.java b/src/test/java/com/puppycrawl/tools/checkstyle/MainTest.java
index c6f349e23..fb6bf6f6c 100644
--- a/src/test/java/com/puppycrawl/tools/checkstyle/MainTest.java
+++ b/src/test/java/com/puppycrawl/tools/checkstyle/MainTest.java
@@ -235,7 +235,7 @@ public class MainTest {
             public void checkAssertion() throws IOException {
                 final String expectedPath = getFilePath("InputMain.java");
                 final ResourceBundle compilationProperties =
-                        ResourceBundle.getBundle("checkstylecompilation");
+                        ResourceBundle.getBundle("checkstylecompilation", Locale.ROOT);
                 final String version = compilationProperties
                     .getString("checkstyle.compile.version");
                 assertEquals(String.format(Locale.ROOT,