diff --git a/num4j/src/main/java/com/onixbyte/nums/PercentileCalculator.java b/num4j/src/main/java/com/onixbyte/nums/PercentileCalculator.java
index 0992f24..6ae9378 100644
--- a/num4j/src/main/java/com/onixbyte/nums/PercentileCalculator.java
+++ b/num4j/src/main/java/com/onixbyte/nums/PercentileCalculator.java
@@ -33,7 +33,6 @@ import java.util.List;
  * <p>
  * This class is final, meaning it cannot be subclassed, and it only contains static methods,
  * so instances of the class cannot be created.
- * </p>
  * <h2>Example usage:</h2>
  * <pre>
  * {@code
@@ -49,6 +48,12 @@ import java.util.List;
  */
 public final class PercentileCalculator {
 
+    /**
+     * Private constructor prevents from being initialised.
+     */
+    private PercentileCalculator() {
+    }
+
     /**
      * Calculates the specified percentile from a list of values.
      * <p>
diff --git a/num4j/src/main/java/com/onixbyte/nums/model/QuartileBounds.java b/num4j/src/main/java/com/onixbyte/nums/model/QuartileBounds.java
index 3936e61..3233e61 100644
--- a/num4j/src/main/java/com/onixbyte/nums/model/QuartileBounds.java
+++ b/num4j/src/main/java/com/onixbyte/nums/model/QuartileBounds.java
@@ -29,7 +29,6 @@ package com.onixbyte.nums.model;
  *   <li>{@code lowerBound} - The lower bound of the dataset, typically {@code Q1 - 1.5 * IQR}.</li>
  *   <li>{@code upperBound} - The upper bound of the dataset, typically {@code Q3 + 1.5 * IQR}.</li>
  * </ul>
- * </p>
  * <p>
  * Example usage:
  * <pre>
diff --git a/settings.gradle.kts b/settings.gradle.kts
index b840c05..b2d7269 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -20,6 +20,7 @@ rootProject.name = "JDevKit"
 include(
     "devkit-core",
     "devkit-utils",
+    "num4j",
     "map-util-unsafe",
     "guid",
     "key-pair-loader",