diff --git a/script/build-icon-files.js b/script/build-icon-files.js
index 2eac621..71efb9d 100755
--- a/script/build-icon-files.js
+++ b/script/build-icon-files.js
@@ -12,10 +12,8 @@ const svgPathEnd = '"></path>';
 const dataFromSvgFile = {};
 const dataParsedFromApi = {};
 const svgFolder = path.resolve(__dirname, '../dist/svg');
-
-const preferences = require('../data/Preferences.json');
-const iconsData = require('../data/Icons.json');
-const iconsetsData = require('../data/Iconsets.json');
+const preferencesDataPath = path.resolve(__dirname, '../data/Preferences.json');
+const IconsDataPath = path.resolve(__dirname, '../data/Icons.json');
 const outputIndexPath = path.resolve(__dirname, '../src/icons/index.js');
 const outputIconsFolder = path.resolve(__dirname, '../src/icons');
 const outputIconsetsPath = path.resolve(__dirname, '../src/iconsets/index.js');
@@ -56,15 +54,17 @@ fs.readdirSync(svgFolder).forEach(file => {
   dataFromSvgFile[file.split('.svg')[0].toLowerCase()] = { paths, viewBox };
 });
 
-// console.log(dataFromSvgFile);
 if (count > 0) {
   console.log('Incorrect viewBox count', count);
 }
 
-const _majorVersion = preferences.fontPref.metadata.majorVersion;
-const _minorVersion = preferences.fontPref.metadata.minorVersion;
-
+const reference = fs.readFileSync(preferencesDataPath,  'utf-8');
+const referenceData = JSON.parse(reference);
+const _majorVersion = referenceData.fontPref.metadata.majorVersion;
+const _minorVersion = referenceData.fontPref.metadata.minorVersion;
 
+const icons = fs.readFileSync(IconsDataPath,  'utf-8');
+const iconsData = JSON.parse(icons);
 dataParsedFromApi.icons = iconsData
   .sort(function(a, b) {
     var nameA = a.name.toLowerCase() // ignore upper and lowercase
@@ -129,7 +129,7 @@ dataParsedFromApi.icons = iconsData
 }
 
 { // iconsets
-  const iconsets = _sortBy(iconsetsData, ['id']);
+  const iconsets = _sortBy(require('../data/Iconsets.json'), ['id']);
   const ejsTemplate = [
     '// AUTO-GENERATED FILE. DO NOT MODIFY.',
     '',