diff --git a/src/main/java/de/articdive/jnoise/noise/octaved/OctaveNoiseResult.java b/src/main/java/de/articdive/jnoise/noise/octaved/OctaveNoiseResult.java
index 34deb6e..d1094c5 100644
--- a/src/main/java/de/articdive/jnoise/noise/octaved/OctaveNoiseResult.java
+++ b/src/main/java/de/articdive/jnoise/noise/octaved/OctaveNoiseResult.java
@@ -23,7 +23,7 @@
 /**
  * @author Lukas Mansour
  */
-public class OctaveNoiseResult implements NoiseResult {
+public final class OctaveNoiseResult implements NoiseResult {
     private final double noiseValue;
 
     OctaveNoiseResult(double noiseValue) {
diff --git a/src/main/java/de/articdive/jnoise/noise/opensimplex/FastSimplexBuilder.java b/src/main/java/de/articdive/jnoise/noise/opensimplex/FastSimplexBuilder.java
index 329c4b7..56bfe1a 100644
--- a/src/main/java/de/articdive/jnoise/noise/opensimplex/FastSimplexBuilder.java
+++ b/src/main/java/de/articdive/jnoise/noise/opensimplex/FastSimplexBuilder.java
@@ -28,7 +28,7 @@
 /**
  * @author Lukas Mansour
  */
-public class FastSimplexBuilder extends NoiseBuilder {
+public final class FastSimplexBuilder extends NoiseBuilder {
     private long seed = 1729;
     private double frequency = 1.0;
     private Simplex2DVariant variant2D = Simplex2DVariant.CLASSIC;
diff --git a/src/main/java/de/articdive/jnoise/noise/opensimplex/FastSimplexGenerator.java b/src/main/java/de/articdive/jnoise/noise/opensimplex/FastSimplexGenerator.java
index 6edbf4a..c017798 100644
--- a/src/main/java/de/articdive/jnoise/noise/opensimplex/FastSimplexGenerator.java
+++ b/src/main/java/de/articdive/jnoise/noise/opensimplex/FastSimplexGenerator.java
@@ -27,7 +27,7 @@
 /**
  * @author Lukas Mansour
  */
-public class FastSimplexGenerator extends NoiseGenerator<FastSimplexResult> {
+public final class FastSimplexGenerator extends NoiseGenerator<FastSimplexResult> {
     private final OpenSimplex2F simplex;
     private final double frequency;
     private final Simplex2DVariant variant2D;
diff --git a/src/main/java/de/articdive/jnoise/noise/opensimplex/FastSimplexResult.java b/src/main/java/de/articdive/jnoise/noise/opensimplex/FastSimplexResult.java
index c366014..e7ecabc 100644
--- a/src/main/java/de/articdive/jnoise/noise/opensimplex/FastSimplexResult.java
+++ b/src/main/java/de/articdive/jnoise/noise/opensimplex/FastSimplexResult.java
@@ -23,7 +23,7 @@
 /**
  * @author Lukas Mansour
  */
-public class FastSimplexResult implements NoiseResult {
+public final class FastSimplexResult implements NoiseResult {
     private final double noiseValue;
 
     FastSimplexResult(double noiseValue) {
diff --git a/src/main/java/de/articdive/jnoise/noise/opensimplex/SuperSimplexBuilder.java b/src/main/java/de/articdive/jnoise/noise/opensimplex/SuperSimplexBuilder.java
index 8ab03bb..6b5e650 100644
--- a/src/main/java/de/articdive/jnoise/noise/opensimplex/SuperSimplexBuilder.java
+++ b/src/main/java/de/articdive/jnoise/noise/opensimplex/SuperSimplexBuilder.java
@@ -28,7 +28,7 @@
 /**
  * @author Lukas Mansour
  */
-public class SuperSimplexBuilder extends NoiseBuilder {
+public final class SuperSimplexBuilder extends NoiseBuilder {
     private long seed = 1729;
     private double frequency = 1.0;
     private Simplex2DVariant variant2D = Simplex2DVariant.CLASSIC;
diff --git a/src/main/java/de/articdive/jnoise/noise/opensimplex/SuperSimplexGenerator.java b/src/main/java/de/articdive/jnoise/noise/opensimplex/SuperSimplexGenerator.java
index 4512bee..642b00a 100644
--- a/src/main/java/de/articdive/jnoise/noise/opensimplex/SuperSimplexGenerator.java
+++ b/src/main/java/de/articdive/jnoise/noise/opensimplex/SuperSimplexGenerator.java
@@ -27,7 +27,7 @@
 /**
  * @author Lukas Mansour
  */
-public class SuperSimplexGenerator extends NoiseGenerator<SuperSimplexResult> {
+public final class SuperSimplexGenerator extends NoiseGenerator<SuperSimplexResult> {
     private final OpenSimplex2S simplex;
     private final double frequency;
     private final Simplex2DVariant variant2D;
diff --git a/src/main/java/de/articdive/jnoise/noise/opensimplex/SuperSimplexResult.java b/src/main/java/de/articdive/jnoise/noise/opensimplex/SuperSimplexResult.java
index 8bde8df..5d09f48 100644
--- a/src/main/java/de/articdive/jnoise/noise/opensimplex/SuperSimplexResult.java
+++ b/src/main/java/de/articdive/jnoise/noise/opensimplex/SuperSimplexResult.java
@@ -23,7 +23,7 @@
 /**
  * @author Lukas Mansour
  */
-public class SuperSimplexResult implements NoiseResult {
+public final class SuperSimplexResult implements NoiseResult {
     private final double noiseValue;
 
     SuperSimplexResult(double noiseValue) {
diff --git a/src/main/java/de/articdive/jnoise/noise/perlin/PerlinNoiseResult.java b/src/main/java/de/articdive/jnoise/noise/perlin/PerlinNoiseResult.java
index e394d7e..612139f 100644
--- a/src/main/java/de/articdive/jnoise/noise/perlin/PerlinNoiseResult.java
+++ b/src/main/java/de/articdive/jnoise/noise/perlin/PerlinNoiseResult.java
@@ -23,7 +23,7 @@
 /**
  * @author Lukas Mansour
  */
-public class PerlinNoiseResult implements NoiseResult {
+public final class PerlinNoiseResult implements NoiseResult {
     private final double noiseValue;
 
     PerlinNoiseResult(double noiseValue) {
diff --git a/src/main/java/de/articdive/jnoise/noise/value/ValueNoiseResult.java b/src/main/java/de/articdive/jnoise/noise/value/ValueNoiseResult.java
index 05897d8..486b402 100644
--- a/src/main/java/de/articdive/jnoise/noise/value/ValueNoiseResult.java
+++ b/src/main/java/de/articdive/jnoise/noise/value/ValueNoiseResult.java
@@ -23,7 +23,7 @@
 /**
  * @author Lukas Mansour
  */
-public class ValueNoiseResult implements NoiseResult {
+public final class ValueNoiseResult implements NoiseResult {
     private final double noiseValue;
 
     ValueNoiseResult(double noiseValue) {
diff --git a/src/main/java/de/articdive/jnoise/noise/white/WhiteNoiseResult.java b/src/main/java/de/articdive/jnoise/noise/white/WhiteNoiseResult.java
index b599212..cac12f6 100644
--- a/src/main/java/de/articdive/jnoise/noise/white/WhiteNoiseResult.java
+++ b/src/main/java/de/articdive/jnoise/noise/white/WhiteNoiseResult.java
@@ -23,7 +23,7 @@
 /**
  * @author Lukas Mansour
  */
-public class WhiteNoiseResult implements NoiseResult {
+public final class WhiteNoiseResult implements NoiseResult {
     private final double noiseValue;
 
     WhiteNoiseResult(double noiseValue) {