diff --git a/.gitignore b/.gitignore
index 4ab2a7f..fc69c39 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,3 @@ module/
 main/
 node_modules/
 .vscode/
-./src/version.js
\ No newline at end of file
diff --git a/gulpfile.js b/gulpfile.js
index 8dd356b..770f395 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -11,16 +11,21 @@ const CJS_DEST = './main';
 
 gulp.task("update-version-file", ()=>{
 
-  const FILE_PATH = './src/version.js';
+  const fileName = 'version.js';
   const VERSION = pkg.version;
-  const CODE = [
+  const ESM_CODE = [
     "// this file is auto generated",
     "// the current version is:",
     "export default \"" + VERSION + "\";",
   ].join('\n');
-
+  const CJS_CODE = [
+    "// this file is auto generated",
+    "// the current version is:",
+    "module.exports = \"" + VERSION + "\";",
+  ].join('\n');
   return new Promise((res) => {
-    fs.writeFileSync(path.resolve(__dirname, FILE_PATH), CODE);
+    fs.writeFileSync(path.resolve(ESM_DEST, fileName), ESM_CODE);
+    fs.writeFileSync(path.resolve(CJS_DEST, fileName), CJS_CODE);
     res('version file updated!');
   });
 
@@ -56,8 +61,7 @@ gulp.task("clean", ()=>{
 });
 
 gulp.task("build", gulp.series([
-    'update-version-file', 
-    'clean', 
-    gulp.parallel(['build:cjs', 'build:esm']),
-  ])
-);
+  'clean', 
+  'update-version-file', 
+  gulp.parallel(['build:cjs', 'build:esm']),
+]));
diff --git a/package-lock.json b/package-lock.json
index 31ba6c0..5a4d81d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "rakam",
-  "version": "0.1.0",
+  "version": "1.0.0-0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 2ad5114..5e1bce7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rakam",
-  "version": "0.1.0",
+  "version": "1.0.0-0",
   "description": "Intense math library. God willing, we won't stop developing it, we will be so happy when you contribute to make this library eligible for all needs and uses.",
   "main": "main",
   "module": "module",
@@ -19,13 +19,12 @@
   "homepage": "https://github.com/scicave/rakam#readme",
   "scripts": {
     "build": "gulp build && rollup -c",
-    "prod": "npm run prepare && npm run build",
+    "prod": "npm run lint && npm run build && npm run test",
     "prepare": "npm run lint && npm run test",
     "lint": "eslint src/ --fix",
     "test": "jest",
     "test:watch": "jest --watch",
-    "preversion": "npm run prepare",
-    "postversion": "npm run build"
+    "preversion": "npm run prod"
   },
   "jest": {
     "verbose": true,
diff --git a/src/geometry/angles/angles-extend.js b/src/geometry/angles/angles-extend.js
index 40704d4..dcd4adc 100644
--- a/src/geometry/angles/angles-extend.js
+++ b/src/geometry/angles/angles-extend.js
@@ -1,4 +1,4 @@
-import { trunc } from "../../../core/index.js";
+import trunc from "../../core/trunc.js";
 
 export const angleTypes = {
   RAD: 'rad',
diff --git a/src/version.js b/src/version.js
index edc5327..a677b84 100644
--- a/src/version.js
+++ b/src/version.js
@@ -1,3 +1,2 @@
-// this file is auto generated
-// the current version is:
-export default "0.1.0";
\ No newline at end of file
+// this file will be auto filled by gulp "genrate-version-file" task. 
+export default "ourversion"; // this is just a placeholder
\ No newline at end of file