diff --git a/changelog.md b/changelog.md
index 8c206d7..feac4cc 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 2026-01-21 - 1.4.2 - fix(classes.dockerfile)
+use a single top-level fs import instead of requiring fs inside methods
+
+- Added top-level import: import * as fs from 'fs' in ts/classes.dockerfile.ts
+- Removed inline require('fs') calls and replaced with the imported fs in constructor and test() to keep imports consistent
+- No behavioral change expected; this is a cleanup/refactor to standardize module usage
+
 ## 2026-01-20 - 1.4.1 - fix(docs)
 update README: expand usage, installation, quick start, features, troubleshooting and migration notes
 
diff --git a/cli.js b/cli.js
old mode 100644
new mode 100755
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index 18c485d..60424c9 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@git.zone/tsdocker',
-  version: '1.4.1',
+  version: '1.4.2',
   description: 'develop npm modules cross platform with docker'
 }
diff --git a/ts/classes.dockerfile.ts b/ts/classes.dockerfile.ts
index 5d4ae04..e935e3c 100644
--- a/ts/classes.dockerfile.ts
+++ b/ts/classes.dockerfile.ts
@@ -4,6 +4,7 @@ import { logger } from './tsdocker.logging.js';
 import { DockerRegistry } from './classes.dockerregistry.js';
 import type { IDockerfileOptions, ITsDockerConfig } from './interfaces/index.js';
 import type { TsDockerManager } from './classes.tsdockermanager.js';
+import * as fs from 'fs';
 
 const smartshellInstance = new plugins.smartshell.Smartshell({
   executor: 'bash',
@@ -314,7 +315,6 @@ export class Dockerfile {
     this.containerName = 'dockerfile-' + this.version;
 
     if (options.filePath && options.read) {
-      const fs = require('fs');
       this.content = fs.readFileSync(plugins.path.resolve(options.filePath), 'utf-8');
     } else if (options.fileContents) {
       this.content = options.fileContents;
@@ -419,7 +419,6 @@ export class Dockerfile {
     const testDir = this.managerRef.config.testDir || plugins.path.join(paths.cwd, 'test');
     const testFile = plugins.path.join(testDir, 'test_' + this.version + '.sh');
 
-    const fs = require('fs');
     const testFileExists = fs.existsSync(testFile);
 
     if (testFileExists) {