diff --git a/CHANGES.md b/CHANGES.md
index 367812e1..851be4dc 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -25,7 +25,9 @@ these methods will need to be updated. The following methods are affected:
 
 ### Improvements
 
-* Javadoc improvements and cleanup ([PR #420](https://github.com/hamcrest/JavaHamcrest/pull/420))
+* Javadoc improvements and cleanup ([PR #420](https://github.com/hamcrest/JavaHamcrest/pull/420),
+[#427](https://github.com/hamcrest/JavaHamcrest/issues/427),
+[PR #428](https://github.com/hamcrest/JavaHamcrest/pull/428))
 * Derive version from git tags ([PR #419](https://github.com/hamcrest/JavaHamcrest/pull/419))
 * Migrate all tests to JUnit Jupiter ([PR #424](https://github.com/hamcrest/JavaHamcrest/pull/424))
 
diff --git a/hamcrest/src/main/java/org/hamcrest/CoreMatchers.java b/hamcrest/src/main/java/org/hamcrest/CoreMatchers.java
index 6dadcc52..f00a6e54 100644
--- a/hamcrest/src/main/java/org/hamcrest/CoreMatchers.java
+++ b/hamcrest/src/main/java/org/hamcrest/CoreMatchers.java
@@ -13,7 +13,10 @@
 @SuppressWarnings("UnusedDeclaration")
 public class CoreMatchers {
 
-  private CoreMatchers() {
+  /**
+   * Unused
+   */
+  public CoreMatchers() {
   }
 
   /**
diff --git a/hamcrest/src/main/java/org/hamcrest/MatcherAssert.java b/hamcrest/src/main/java/org/hamcrest/MatcherAssert.java
index 574f4f61..29d3364e 100644
--- a/hamcrest/src/main/java/org/hamcrest/MatcherAssert.java
+++ b/hamcrest/src/main/java/org/hamcrest/MatcherAssert.java
@@ -6,7 +6,10 @@
  */
 public class MatcherAssert {
 
-    private MatcherAssert() {
+    /**
+     * Unused.
+     */
+    public MatcherAssert() {
     }
 
     /**
diff --git a/hamcrest/src/main/java/org/hamcrest/Matchers.java b/hamcrest/src/main/java/org/hamcrest/Matchers.java
index 714777c2..dcc88366 100644
--- a/hamcrest/src/main/java/org/hamcrest/Matchers.java
+++ b/hamcrest/src/main/java/org/hamcrest/Matchers.java
@@ -22,7 +22,10 @@
 @SuppressWarnings({"unused", "WeakerAccess"})
 public class Matchers {
 
-  private Matchers() {
+  /**
+   * Unused
+   */
+  public Matchers() {
   }
 
   /**