diff --git a/phishing/helpers.py b/phishing/helpers.py
index e3a4720..88a0fd0 100644
--- a/phishing/helpers.py
+++ b/phishing/helpers.py
@@ -8,8 +8,11 @@
 from django.core.mail import EmailMultiAlternatives
 from django.core.mail.backends.smtp import EmailBackend
 from django.core.urlresolvers import reverse
+from django.template import Context
+from django.template import Template
 from django.template.loader import render_to_string
 from django.utils.translation import ugettext_lazy as _
+from jinja2.sandbox import SandboxedEnvironment
 from pyshorteners import Shortener
 
 from mercure.settings import HOSTNAME
@@ -210,7 +213,7 @@ def minimize_url(url):
     return Shortener('Tinyurl', timeout=10.0).short(url) if url else ''
 
 
-def replace_template_vars(template, campaign=None, target=None,
+def render_jinja2(template, campaign=None, target=None,
                           email_template=None):
     """Replace vars in template
 
@@ -220,16 +223,13 @@ def replace_template_vars(template, campaign=None, target=None,
     :param email_template: `.models.EmailTemplate`
     :return: content with value
     """
-    for var in get_template_vars(campaign, target, email_template):
-        names = (
-            '{{%s}}' % var['name'],
-            '{{ %s }}' % var['name']
-        )
-        value = var['value'] or ''
-        for name in names:
-            template = template.replace(name, value)
-
-    return template
+    vars = get_template_vars(campaign, target, email_template)
+    env = SandboxedEnvironment()
+    context = {}
+    for v in vars:
+        context[v['name']] = v['value']
+    tpl = env.from_string(template)
+    return tpl.render(context)
 
 
 def start_campaign(campaign):
@@ -265,7 +265,7 @@ def add_tracker(key, value, infos=None):
 
         # replace template vars helper function
         def replace_vars(content):
-            return replace_template_vars(content, campaign, target,
+            return render_jinja2(content, campaign, target,
                                          email_template)
 
         # send email
diff --git a/phishing/tests/signal.py b/phishing/tests/signal.py
index 0f15b7b..150a2d1 100644
--- a/phishing/tests/signal.py
+++ b/phishing/tests/signal.py
@@ -10,7 +10,7 @@
 from django.urls import reverse
 from shutil import copyfile
 
-from phishing.helpers import get_template_vars, replace_template_vars
+from phishing.helpers import get_template_vars, render_jinja2
 from phishing.models import Attachment, Campaign, EmailTemplate, LandingPage, \
     Target, TargetGroup, Tracker, TrackerInfos
 from phishing.signals import make_campaign_report, make_menu, \
@@ -60,7 +60,7 @@ def handler(vars_data, **kwarg):
         self.assertEqual(var_data['description'], 'Is a test!')
 
         # test replace
-        content = replace_template_vars('{{ test_var }}')
+        content = render_jinja2('{{ test_var }}')
         self.assertEqual(content, 'Hello!')
 
         # clean
@@ -81,7 +81,7 @@ def handler(vars_data, **kwarg):
         self.assertEqual(var_data['value'], 'Hello Word!')
 
         # test replace
-        content = replace_template_vars('{{ email }}')
+        content = render_jinja2('{{ email }}')
         self.assertEqual(content, 'Hello Word!')
 
         # clean
@@ -100,9 +100,9 @@ def handler(vars_data, **kwarg):
         var_data = self.get('email')
         self.assertIsNone(var_data)
 
-        # test replace
-        content = replace_template_vars('{{ email }}')
-        self.assertEqual(content, '{{ email }}')
+        # test render
+        content = render_jinja2('{{ email }}')
+        self.assertEqual(content, '')
 
         # clean
         self.assertTrue(make_template_vars.disconnect(handler))
diff --git a/phishing/tests/template.py b/phishing/tests/template.py
index 6a284be..e811676 100644
--- a/phishing/tests/template.py
+++ b/phishing/tests/template.py
@@ -4,7 +4,8 @@
 from django.test import TestCase
 from django.urls import reverse
 
-from phishing.helpers import minimize_url, get_template_vars
+from phishing.helpers import minimize_url, get_template_vars, \
+    render_jinja2
 from phishing.models import Target, TargetGroup, EmailTemplate
 from phishing.tests.constant import FIXTURE_PATH
 
@@ -240,3 +241,29 @@ def test_delete_email_template_permissions(self):
         self.assertEqual(resp.status_code, 200)
 
         # TODO: Test user that is not admin
+
+    def test_security_template(self):
+        # test render
+        content = render_jinja2('{{ request }}')
+        self.assertEqual(content, '')
+
+        # test render
+        with self.assertRaises(Exception) as context:
+            render_jinja2(
+                "{% include 'phishing/email/tracker_image.html' %}")
+        self.assertTrue('no loader for this environment specified'
+                        in str(context.exception))
+
+        # test load
+        with self.assertRaises(Exception) as context:
+            render_jinja2(
+                '{% load log %}{% get_admin_log 10 as admin_log %}{{ admin_log }}')
+        self.assertTrue('Encountered unknown tag \'load\'.'
+                        in str(context.exception))
+
+        # list load avalible
+        with self.assertRaises(Exception) as context:
+            render_jinja2('{% load fghdfhfghd %}')
+        self.assertTrue('Encountered unknown tag \'load\'.'
+                        in str(context.exception))
+