diff --git a/src/main/java/ch/fritteli/labyrinth/generator/serialization/LabyrinthOutputStream.java b/src/main/java/ch/fritteli/labyrinth/generator/serialization/LabyrinthOutputStream.java
index 1496c69..363a52b 100644
--- a/src/main/java/ch/fritteli/labyrinth/generator/serialization/LabyrinthOutputStream.java
+++ b/src/main/java/ch/fritteli/labyrinth/generator/serialization/LabyrinthOutputStream.java
@@ -6,15 +6,12 @@ import lombok.NonNull;
 
 import java.io.ByteArrayOutputStream;
 
-import static ch.fritteli.labyrinth.generator.serialization.SerializerDeserializer.MAGIC_BYTE_1;
-import static ch.fritteli.labyrinth.generator.serialization.SerializerDeserializer.MAGIC_BYTE_2;
-import static ch.fritteli.labyrinth.generator.serialization.SerializerDeserializer.VERSION_BYTE;
 
 public class LabyrinthOutputStream extends ByteArrayOutputStream {
     public void writeHeader() {
-        this.writeByte(MAGIC_BYTE_1);
-        this.writeByte(MAGIC_BYTE_2);
-        this.writeByte(VERSION_BYTE);
+        this.writeByte(SerializerDeserializer.MAGIC_BYTE_1);
+        this.writeByte(SerializerDeserializer.MAGIC_BYTE_2);
+        this.writeByte(SerializerDeserializer.VERSION_BYTE);
     }
 
     public void writeByte(final byte value) {