diff --git a/.version/changeversion.sh b/.version/changeversion.sh
index d17591c..a7463c4 100755
--- a/.version/changeversion.sh
+++ b/.version/changeversion.sh
@@ -1,5 +1,5 @@
-old="4.0.2-SNAPSHOT"
-new="4.0.2"
+new="4.0.3"
+old="4.0.3-SNAPSHOT"
 
 find ../ -type f \( -name "pom.xml" \) \
   -exec sed -i -e "s/<revision>$old<\/revision>/<revision>$new<\/revision>/g" {} \;
diff --git a/.version/tips.txt b/.version/tips.txt
index 7b2b4d3..e1ce7c2 100644
--- a/.version/tips.txt
+++ b/.version/tips.txt
@@ -31,8 +31,13 @@ go to oss.sonatype.org
    promote... wait
    release ... wait some hours
    test <putting on dependencies>
-on github
+on github (after oss part)
    pull request of the released branch
    create a new release
 
 ------ escpos-samples production
+create a branch with name of actual version from master
+ex master to 4.0.2
+// the actual version is on master branch
+same on .version/changeversion.sh
+change version on wiki
diff --git a/README.md b/README.md
index d2bdd42..cfefee4 100644
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ Download code and binaries from the [last release of escpos-coffee](https://gith
 <dependency>
   <groupId>com.github.anastaciocintra</groupId>
   <artifactId>escpos-coffee</artifactId>
-  <version>4.0.2</version>
+  <version>4.0.3</version>
 </dependency>
 ```
 
@@ -65,7 +65,7 @@ repositories {
 Step 2. Add the dependency
 ```
 dependencies {
-    implementation 'com.github.anastaciocintra:escpos-coffee:4.0.2'
+    implementation 'com.github.anastaciocintra:escpos-coffee:4.0.3'
 }
 ```
 
@@ -85,7 +85,7 @@ Then the jar file will be generated inside the 'target/' folder, just add the ja
 
 ## Samples
 
-You can find all samples codes on https://github.com/anastaciocintra/escpos-coffee-samples 
+You can find all samples codes on [https://github.com/anastaciocintra/escpos-coffee-samples](https://github.com/anastaciocintra/escpos-coffee-samples) 
 
 
 ### getstart sample
diff --git a/pom.xml b/pom.xml
index ef0c814..31b3bbc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -23,7 +23,7 @@
 
 
     <properties>
-        <revision>4.0.2</revision>
+        <revision>4.0.3</revision>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
diff --git a/src/main/java/com/github/anastaciocintra/escpos/EscPos.java b/src/main/java/com/github/anastaciocintra/escpos/EscPos.java
index 1c6afd3..32bdbfe 100644
--- a/src/main/java/com/github/anastaciocintra/escpos/EscPos.java
+++ b/src/main/java/com/github/anastaciocintra/escpos/EscPos.java
@@ -379,7 +379,7 @@ public EscPos write(String text) throws UnsupportedEncodingException, IOExceptio
      */
     public EscPos writeLF(Style style, String text) throws UnsupportedEncodingException, IOException {
         write(style, text);
-        write(10);
+        write(LF);
         return this;
     }
 
@@ -478,23 +478,17 @@ public EscPos cut(CutMode mode) throws IOException {
      * @exception IOException if an I/O error occurs.
      * @exception IllegalArgumentException if nLines out of range 0 to 255
      */
-    public EscPos feed(Style style, int nLines) throws IOException, IllegalArgumentException {
+    public EscPos feed(Style style, int nLines) throws IOException, IllegalArgumentException{
         if (nLines < 1 || nLines > 255) {
             throw new IllegalArgumentException("nLines must be between 1 and 255");
         }
-        if(nLines == 1){
+        byte[] configBytes = style.getConfigBytes();
+        write(configBytes, 0, configBytes.length);
+        for(int n = 0; n < nLines; n++){
             write(LF);
-        }else {
-            byte[] configBytes = style.getConfigBytes();
-            write(configBytes, 0, configBytes.length);
-            write(ESC);
-            write('d');
-            write(nLines);
         }
         return this;
-
     }
-
     /**
      * Call feed with default style.
      *
diff --git a/src/main/java/com/github/anastaciocintra/escpos/image/BitonalOrderedDither.java b/src/main/java/com/github/anastaciocintra/escpos/image/BitonalOrderedDither.java
index 73a7564..7f9bc7a 100644
--- a/src/main/java/com/github/anastaciocintra/escpos/image/BitonalOrderedDither.java
+++ b/src/main/java/com/github/anastaciocintra/escpos/image/BitonalOrderedDither.java
@@ -5,7 +5,10 @@
 package com.github.anastaciocintra.escpos.image;
 
 import static java.lang.Math.round;
+
+import java.util.HashSet;
 import java.util.Random;
+import java.util.Set;
 
 /**
  * Implements ordered dithering based on a <code>ditherMatrix</code> <p>
@@ -67,8 +70,8 @@ public BitonalOrderedDither(int matrixWidth, int matrixHeight, int thresholdMin,
         float positionValue = (float)thresholdMin;
 
         Random randomCoordinates = new Random(1);
-        int shuffledX[] = randomCoordinates.ints(0, matrixWidth).distinct().limit(matrixWidth).toArray();
-        int shuffledY[] = randomCoordinates.ints(0, matrixHeight).distinct().limit(matrixHeight).toArray();
+        int shuffledX[] = shuffle(matrixWidth, randomCoordinates);
+        int shuffledY[] = shuffle(matrixHeight, randomCoordinates);
 
         for(int x = 0; x < matrixWidth; x++){
             for(int y = 0; y < matrixHeight; y++){
@@ -77,6 +80,21 @@ public BitonalOrderedDither(int matrixWidth, int matrixHeight, int thresholdMin,
             }
         }
     }
+    private int[] shuffle(int size,Random random){
+        Set<Integer> set = new HashSet<>();
+        int intArray[] = new int[size];
+        int i = 0;
+        while(set.size() < size){
+            int val = random.nextInt(size);
+            if(set.contains(val)){
+                continue;
+            }
+            set.add(val);
+            intArray[i++] = val;
+        }
+
+        return intArray;
+    }
     /**
      * Creates a new BitonalOrderedDither with default values.
      */