diff --git a/pom.xml b/pom.xml
index 1db78a5dbb..d9ea86ebb6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -314,6 +314,7 @@
     </contributor>
     <contributor>
       <name>Amey Jadiye</name>
+      <email>ameyjadiye@gmail.com</email>
     </contributor>
     <contributor>
       <name>Arun Vinud S S</name>
diff --git a/src/main/java/org/apache/commons/text/RandomStringGenerator.java b/src/main/java/org/apache/commons/text/RandomStringGenerator.java
index d8892fc557..02af0d43b8 100644
--- a/src/main/java/org/apache/commons/text/RandomStringGenerator.java
+++ b/src/main/java/org/apache/commons/text/RandomStringGenerator.java
@@ -341,8 +341,10 @@ public Builder withinRange(final int minimumCodePoint, final int maximumCodePoin
          * @return {@code this}, to allow method chaining.
          */
         public Builder withinRange(final char[] ... pairs) {
-            characterList = new ArrayList<>();
+            characterList = new ArrayList<Character>();
             for (final char[] pair :  pairs) {
+                Validate.isTrue(pair.length == 2,
+                      "Each pair must contain minimum and maximum code point");
                 final int minimumCodePoint = pair[0];
                 final int maximumCodePoint = pair[1];
                 Validate.isTrue(minimumCodePoint <= maximumCodePoint,