diff --git a/README.md b/README.md
index 3ee0bee..632d8fc 100644
--- a/README.md
+++ b/README.md
@@ -91,12 +91,12 @@ java -jar image-comparison.jar -h
 <dependency>
     <groupId>com.github.romankh3</groupId>
     <artifactId>image-comparison</artifactId>
-    <version>3.3.0</version>
+    <version>3.3.1</version>
 </dependency>
 ```
 ##### Gradle
 ```groovy
-compile 'com.github.romankh3:image-comparison:3.3.0'
+compile 'com.github.romankh3:image-comparison:3.3.1'
 ```
 
 #### To compare two images programmatically
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index a26a7a0..6f854d1 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,4 +1,9 @@
 # Release Notes
+## 3.3.1
+*   Fixed bug #134: If image is different in a line in 1 px, ComparisonState is always MATCH
+*   Fixed bug #136: deepCopy method throws IllegalArgumentException on shared BufferedImage
+*   added GitHub workflow to the project.
+
 ## 3.3.0
 *   Added option to get the pixels difference percentage between images in case of SIZE_MISMATCH.
 *   Fixed NPE for default run from commandLine(#131)
diff --git a/build.gradle b/build.gradle
index 6b0085f..35ec3b7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -8,7 +8,7 @@ plugins {
 }
 
 group 'com.github.romankh3'
-version '3.3.1-SNAPSHOT'
+version '3.3.1'
 description 'A library and utility to compare different images.'
 sourceCompatibility = 1.8
 
diff --git a/pom.xml b/pom.xml
index a348482..b1f5d98 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>com.github.romankh3</groupId>
     <artifactId>image-comparison</artifactId>
-    <version>3.3.1-SNAPSHOT</version>
+    <version>3.3.1</version>
     <packaging>jar</packaging>
 
     <name>Image Comparison</name>
diff --git a/src/main/java/com/github/romankh3/image/comparison/ImageComparison.java b/src/main/java/com/github/romankh3/image/comparison/ImageComparison.java
index 598cb6a..12dd519 100644
--- a/src/main/java/com/github/romankh3/image/comparison/ImageComparison.java
+++ b/src/main/java/com/github/romankh3/image/comparison/ImageComparison.java
@@ -355,13 +355,13 @@ private BufferedImage drawRectangles(List<Rectangle> rectangles) throws IOExcept
 
     /**
      * Draw rectangles based on collection of the {@link Rectangle} and {@link Graphics2D}.
+     * getWidth/getHeight return real width/height,
+     * so need to draw rectangle on one px smaller because minpoint + width/height is point on excluded pixel.
      *
      * @param graphics the {@link Graphics2D} object for drawing.
      * @param rectangles the collection of the {@link Rectangle}.
      */
     private void draw(Graphics2D graphics, List<Rectangle> rectangles) {
-        // getWidth/getHeight return real width/height,
-        // so need to draw rectangle on one px smaller because minpoint + width/height is point on excluded pixel
         rectangles.forEach(rectangle -> graphics.drawRect(rectangle.getMinPoint().getX(),
                 rectangle.getMinPoint().getY(),
                 rectangle.getWidth() - 1,
diff --git a/src/main/java/com/github/romankh3/image/comparison/model/Rectangle.java b/src/main/java/com/github/romankh3/image/comparison/model/Rectangle.java
index 9c403b3..e7294d0 100644
--- a/src/main/java/com/github/romankh3/image/comparison/model/Rectangle.java
+++ b/src/main/java/com/github/romankh3/image/comparison/model/Rectangle.java
@@ -130,20 +130,22 @@ public Integer size() {
 
     /**
      * Count the width of the {@link Rectangle}.
+     * Min and max point are included, so real width is +1px
      *
      * @return rectangle width.
      */
     public int getWidth() {
-        return maxPoint.getX() - minPoint.getX() + 1; // min and max point are included, so real width is +1px
+        return maxPoint.getX() - minPoint.getX() + 1;
     }
 
     /**
      * Count the height of the {@link Rectangle}.
+     * Min and max point are included, so real width is +1px.
      *
      * @return rectangle height.
      */
     public int getHeight() {
-        return maxPoint.getY() - minPoint.getY() + 1; // min and max point are included, so real width is +1px
+        return maxPoint.getY() - minPoint.getY() + 1;
     }
 
     /**