diff --git a/.idea/prettier.xml b/.idea/prettier.xml
new file mode 100644
index 0000000..0c83ac4
--- /dev/null
+++ b/.idea/prettier.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="PrettierConfiguration">
+    <option name="myConfigurationMode" value="AUTOMATIC" />
+    <option name="myRunOnSave" value="true" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/package.json b/package.json
index f1b4cf0..338f13e 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
     "type": "module",
     "name": "@btc-vision/bsi-binary",
-    "version": "1.0.1",
+    "version": "1.0.2",
     "description": "",
     "main": "build/index.js",
     "types": "build/index.d.ts",
diff --git a/src/buffer/BinaryReader.ts b/src/buffer/BinaryReader.ts
index c5bd66d..18449d6 100644
--- a/src/buffer/BinaryReader.ts
+++ b/src/buffer/BinaryReader.ts
@@ -145,11 +145,12 @@ export class BinaryReader {
         return value;
     }
 
-    public readU32(): u32 {
+    public readU32(le: boolean = true): u32 {
         this.verifyEnd(this.currentOffset + 4);
 
-        const value = this.buffer.getUint32(this.currentOffset, true);
+        const value = this.buffer.getUint32(this.currentOffset, le);
         this.currentOffset += 4;
+
         return value;
     }
 
@@ -217,7 +218,7 @@ export class BinaryReader {
     }
 
     public readSelector(): Selector {
-        return this.readU32();
+        return this.readU32(false);
     }
 
     public readStringWithLength(): string {
diff --git a/src/buffer/BinaryWriter.ts b/src/buffer/BinaryWriter.ts
index da7d947..3e41f47 100644
--- a/src/buffer/BinaryWriter.ts
+++ b/src/buffer/BinaryWriter.ts
@@ -1,4 +1,3 @@
-import { BinaryReader } from './BinaryReader.js';
 import {
     Address,
     ADDRESS_BYTE_LENGTH,
@@ -16,6 +15,7 @@ import {
 } from './types/math.js';
 
 import { BufferHelper } from '../utils/BufferHelper';
+import { BinaryReader } from './BinaryReader';
 
 export class BinaryWriter {
     private currentOffset: u32 = 0;
@@ -34,9 +34,9 @@ export class BinaryWriter {
         this.currentOffset += 2;
     }
 
-    public writeU32(value: u32): void {
+    public writeU32(value: u32, le: boolean = true): void {
         this.allocSafe(4);
-        this.buffer.setUint32(this.currentOffset, value, true);
+        this.buffer.setUint32(this.currentOffset, value, le);
         this.currentOffset += 4;
     }
 
@@ -46,7 +46,7 @@ export class BinaryWriter {
     }
 
     public writeSelector(value: Selector): void {
-        this.writeU32(value);
+        this.writeU32(value, false);
     }
 
     public writeBoolean(value: boolean): void {