diff --git a/fabcar/enrollAdmin.js b/fabcar/enrollAdmin.js
index 9798479e..4ddd9ba5 100644
--- a/fabcar/enrollAdmin.js
+++ b/fabcar/enrollAdmin.js
@@ -12,8 +12,6 @@ var Fabric_Client = require('fabric-client');
 var Fabric_CA_Client = require('fabric-ca-client');
 
 var path = require('path');
-var util = require('util');
-var os = require('os');
 
 //
 var fabric_client = new Fabric_Client();
diff --git a/fabcar/invoke.js b/fabcar/invoke.js
index 1c0270ac..7ac5a5be 100644
--- a/fabcar/invoke.js
+++ b/fabcar/invoke.js
@@ -11,7 +11,6 @@
 var Fabric_Client = require('fabric-client');
 var path = require('path');
 var util = require('util');
-var os = require('os');
 
 //
 var fabric_client = new Fabric_Client();
diff --git a/fabcar/query.js b/fabcar/query.js
index ba57ac3f..3317692d 100644
--- a/fabcar/query.js
+++ b/fabcar/query.js
@@ -10,8 +10,6 @@
 
 var Fabric_Client = require('fabric-client');
 var path = require('path');
-var util = require('util');
-var os = require('os');
 
 //
 var fabric_client = new Fabric_Client();
diff --git a/fabcar/registerUser.js b/fabcar/registerUser.js
index 4b4c9091..a9c6be1f 100644
--- a/fabcar/registerUser.js
+++ b/fabcar/registerUser.js
@@ -12,8 +12,6 @@ var Fabric_Client = require('fabric-client');
 var Fabric_CA_Client = require('fabric-ca-client');
 
 var path = require('path');
-var util = require('util');
-var os = require('os');
 
 //
 var fabric_client = new Fabric_Client();