diff --git a/changelog.md b/changelog.md
index 300f0aee..d42784e0 100644
--- a/changelog.md
+++ b/changelog.md
@@ -9,6 +9,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ## Changed
 
 - [Change `com.sun.activation:jakarta.activation` to `jakarta.activation:jakarta.activation-api`](https://github.com/ballerina-platform/ballerina-standard-library/issues/4789)
+- [Make some of the Java classes proper utility classes](https://github.com/ballerina-platform/ballerina-standard-library/issues/4940)
 
 ## [2.6.0] - 2022-02-20
 
diff --git a/native/src/main/java/io/ballerina/stdlib/mime/util/MimeConstants.java b/native/src/main/java/io/ballerina/stdlib/mime/util/MimeConstants.java
index c5dafdcf..eabc0e4e 100644
--- a/native/src/main/java/io/ballerina/stdlib/mime/util/MimeConstants.java
+++ b/native/src/main/java/io/ballerina/stdlib/mime/util/MimeConstants.java
@@ -28,7 +28,9 @@
 /**
  * Constants related to MIME.
  */
-public class MimeConstants {
+public final class MimeConstants {
+
+    private MimeConstants() {}
 
     public static final String ENTITY = "Entity";
     public static final String MEDIA_TYPE = "MediaType";
diff --git a/test-utils/src/main/java/io/ballerina/stdlib/mime/testutils/Assert.java b/test-utils/src/main/java/io/ballerina/stdlib/mime/testutils/Assert.java
index c0f3a33a..e515c8b6 100644
--- a/test-utils/src/main/java/io/ballerina/stdlib/mime/testutils/Assert.java
+++ b/test-utils/src/main/java/io/ballerina/stdlib/mime/testutils/Assert.java
@@ -3,7 +3,9 @@
 /**
  * Contains assert functions used by mime test cases.
  */
-public class Assert {
+public final class Assert {
+
+    private Assert() {}
 
     public static void assertEquals(Object actual, Object expected) {
         if (!areEqual(actual, expected)) {