diff --git a/core/src/main/java/org/apache/commons/proxy2/ProxyUtils.java b/core/src/main/java/org/apache/commons/proxy2/ProxyUtils.java
index 1495968..5ffe991 100644
--- a/core/src/main/java/org/apache/commons/proxy2/ProxyUtils.java
+++ b/core/src/main/java/org/apache/commons/proxy2/ProxyUtils.java
@@ -31,7 +31,7 @@
  * @author James Carman
  * @since 1.0
  */
-public class ProxyUtils
+public final class ProxyUtils
 {
 //**********************************************************************************************************************
 // Fields
diff --git a/javassist/src/main/java/org/apache/commons/proxy2/javassist/JavassistUtils.java b/javassist/src/main/java/org/apache/commons/proxy2/javassist/JavassistUtils.java
index 0ba306c..92d65fb 100644
--- a/javassist/src/main/java/org/apache/commons/proxy2/javassist/JavassistUtils.java
+++ b/javassist/src/main/java/org/apache/commons/proxy2/javassist/JavassistUtils.java
@@ -35,7 +35,7 @@
  * @author James Carman
  * @since 1.0
  */
-class JavassistUtils
+final class JavassistUtils
 {
 //**********************************************************************************************************************
 // Fields