diff --git a/src/main/java/airfield/App.java b/src/main/java/airfield/App.java
index f94620e..b737ac6 100644
--- a/src/main/java/airfield/App.java
+++ b/src/main/java/airfield/App.java
@@ -9,17 +9,25 @@
 public class App {
 
     public final static void main(String args[]) {
-        if (args.length != 2) {
+        if (args.length < 2) {
             usage();
             return;
         }
         String local = args[0];
         String remote = args[1];
-        TakeDown installer = new TakeDown(local, remote);
+        String user = null;
+        String password = null;
+        if (args.length == 4) {
+            user = args[2];
+            password = args[3];
+        }
+                
+        TakeDown installer;
+            installer = new TakeDown(local, remote, user, password);            
         installer.installOrUpdate();
     }
 
     static void usage() {
-        System.out.println("Use: java -jar airfield.App [PATH_TO_LOCAL_APP] [PATH_TO_REMOTE_GIT_REPO]");
+        System.out.println("Use: java -jar airfield.App PATH_TO_LOCAL_APP PATH_TO_REMOTE_GIT_REPO [userName] [ password]");
     }
 }
diff --git a/src/main/java/com/airhacks/airfield/TakeDown.java b/src/main/java/com/airhacks/airfield/TakeDown.java
index 4393408..4bbf170 100644
--- a/src/main/java/com/airhacks/airfield/TakeDown.java
+++ b/src/main/java/com/airhacks/airfield/TakeDown.java
@@ -6,11 +6,14 @@
 import java.io.IOException;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import org.eclipse.jgit.api.CloneCommand;
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.PullCommand;
 import org.eclipse.jgit.api.PullResult;
 import org.eclipse.jgit.api.ResetCommand;
 import org.eclipse.jgit.api.errors.GitAPIException;
+import org.eclipse.jgit.transport.CredentialsProvider;
+import org.eclipse.jgit.transport.UsernamePasswordCredentialsProvider;
 
 /**
  *
@@ -21,18 +24,27 @@ public class TakeDown {
     private final String remotePath;
     private final String localPath;
     private Git git;
+    CredentialsProvider cp = null;
 
-    public TakeDown(String localPath, String remotePath) {
+    public TakeDown(String localPath, String remotePath, String userName, String password) {
         this.remotePath = remotePath;
         this.localPath = localPath;
+        if (userName != null && password != null) {
+            cp = new UsernamePasswordCredentialsProvider(userName, password);
+        }
     }
 
     void initialDownload() {
+
         try {
-            this.git = Git.cloneRepository()
+            CloneCommand clone = Git.cloneRepository()
                     .setURI(remotePath)
-                    .setDirectory(new File(localPath))
-                    .call();
+                    .setDirectory(new File(localPath));
+            if (cp != null) {
+                clone = clone.setCredentialsProvider(cp);
+            }
+            this.git = clone.call();
+
             System.out.println("+App installed into: " + this.localPath);
         } catch (GitAPIException ex) {
             System.err.println("--Cannot download files: " + ex.getMessage());
@@ -49,6 +61,9 @@ void update() {
             throw new IllegalStateException("Cannot reset local repository", ex);
         }
         PullCommand command = this.git.pull();
+        if (cp != null) {
+            command.setCredentialsProvider(cp);
+        }
         try {
             PullResult pullResult = command.call();
             if (pullResult.isSuccessful()) {
diff --git a/src/test/java/com/airhacks/airfield/TakeDownIT.java b/src/test/java/com/airhacks/airfield/TakeDownIT.java
index 1150c17..609bb8e 100644
--- a/src/test/java/com/airhacks/airfield/TakeDownIT.java
+++ b/src/test/java/com/airhacks/airfield/TakeDownIT.java
@@ -40,7 +40,7 @@ public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOEx
 
             });
         }
-        this.cut = new TakeDown(LOCAL_REPO, "git://localhost:4242/");
+        this.cut = new TakeDown(LOCAL_REPO, "git://localhost:4242/", null, null);
     }
 
     @Test