diff --git a/packages/cspell-tools/.travis.yml b/packages/cspell-tools/.travis.yml
index 28efe9faab34..8d7d88df6e84 100644
--- a/packages/cspell-tools/.travis.yml
+++ b/packages/cspell-tools/.travis.yml
@@ -2,6 +2,7 @@ language: node_js
 node_js:
   - "node"
   - "6"
+  - "4"
 script:
   - npm install
   - npm run build
diff --git a/packages/cspell-tools/package.json b/packages/cspell-tools/package.json
index df99136f8128..fa849279932e 100644
--- a/packages/cspell-tools/package.json
+++ b/packages/cspell-tools/package.json
@@ -54,6 +54,6 @@
     "xregexp": "^3.1.1"
   },
   "engines": {
-    "node": ">=6.0.0"
+    "node": ">=4.7.0"
   }
 }
diff --git a/packages/cspell-tools/src/app.ts b/packages/cspell-tools/src/app.ts
index 9addb65a5565..dc0bba887460 100644
--- a/packages/cspell-tools/src/app.ts
+++ b/packages/cspell-tools/src/app.ts
@@ -2,8 +2,7 @@
 
 import { compileWordList } from './wordListCompiler';
 import * as path from 'path';
-
-const program = require('commander');
+import * as program from 'commander';
 const npmPackage = require(path.join(__dirname, '..', 'package.json'));
 
 program