diff --git a/src/apps.js b/src/apps.js
index e4ad1c4c2..03dbd3bd3 100644
--- a/src/apps.js
+++ b/src/apps.js
@@ -648,42 +648,31 @@ function exec(appId, options, callback) {
         if (error && error.reason === DatabaseError.NOT_FOUND) return callback(new AppsError(AppsError.NOT_FOUND, 'No such app'));
         if (error) return callback(new AppsError(AppsError.INTERNAL_ERROR, error));
 
-       var createOptions = {
+        var container = docker.connection.getContainer(app.containerId);
+
+       var execOptions = {
             AttachStdin: true,
             AttachStdout: true,
             AttachStderr: true,
-            OpenStdin: true,
-            StdinOnce: false,
-            Tty: true
+            Tty: true,
+            Cmd: cmd
         };
 
-        docker.createSubcontainer(app, app.id + '-exec-' + Date.now(), cmd, createOptions, function (error, container) {
+        container.exec(execOptions, function (error, exec) {
             if (error) return callback(new AppsError(AppsError.INTERNAL_ERROR, error));
-
-            container.attach({ stream: true, stdin: true, stdout: true, stderr: true }, function (error, stream) {
+            var startOptions = {
+                Detach: false,
+                Tty: true,
+                stdin: true // this is a dockerode option that enabled openStdin in the modem
+            };
+            exec.start(startOptions, function(error, stream) {
                 if (error) return callback(new AppsError(AppsError.INTERNAL_ERROR, error));
 
-                docker.startContainer(container.id, function (error) {
-                    if (error) return callback(new AppsError(AppsError.INTERNAL_ERROR, error));
+                if (options.rows && options.columns) {
+                    exec.resize({ h: options.rows, w: options.columns }, function (error) { if (error) debug('Error resizing console', error); });
+                }
 
-                    if (options.rows && options.columns) {
-                        container.resize({ h: options.rows, w: options.columns }, NOOP_CALLBACK);
-                    }
-
-                    var deleteContainer = once(docker.deleteContainer.bind(null, container.id, NOOP_CALLBACK));
-
-                    container.wait(function (error) {
-                        if (error) debug('Error waiting on container', error);
-
-                        debug('exec: container finished', container.id);
-
-                        deleteContainer();
-                    });
-
-                    stream.close = deleteContainer;
-
-                    callback(null, stream);
-                });
+                return callback(null, stream);
             });
         });
     });
diff --git a/src/docker.js b/src/docker.js
index 4e024560b..3276728c1 100644
--- a/src/docker.js
+++ b/src/docker.js
@@ -159,7 +159,7 @@ function createSubcontainer(app, name, cmd, options, callback) {
     var memoryLimit = manifest.memoryLimit || (developmentMode ? 0 : 1024 * 1024 * 200); // 200mb by default
     // for subcontainers, this should ideally be false. but docker does not allow network sharing if the app container is not running
     // this means cloudron exec does not work
-    var isolatedNetworkNs = isAppContainer || !developmentMode;
+    var isolatedNetworkNs = true;
 
     addons.getEnvironment(app, function (error, addonEnv) {
         if (error) return callback(new Error('Error getting addon environment : ' + error));
diff --git a/src/routes/apps.js b/src/routes/apps.js
index 2c7cd040a..855d06989 100644
--- a/src/routes/apps.js
+++ b/src/routes/apps.js
@@ -369,8 +369,5 @@ function exec(req, res, next) {
 
         duplexStream.pipe(res.socket);
         res.socket.pipe(duplexStream);
-
-        res.on('close', duplexStream.close);
     });
 }
-