diff --git a/modoboa_installer/package.py b/modoboa_installer/package.py
index e4b00cc..a734207 100644
--- a/modoboa_installer/package.py
+++ b/modoboa_installer/package.py
@@ -46,7 +46,7 @@ class DEBPackage(Package):
     def install_many(self, names):
         """Install many packages."""
         self.update()
-        utils.exec_cmd("apt-get install --quiet --assume-yes {}".format(
+        return utils.exec_cmd("apt-get install --quiet --assume-yes {}".format(
             " ".join(names)))
 
     def get_installed_version(self, name):
@@ -76,7 +76,7 @@ class RPMPackage(Package):
 
     def install_many(self, names):
         """Install many packages."""
-        utils.exec_cmd("yum install -y --quiet {}".format(" ".join(names)))
+        return utils.exec_cmd("yum install -y --quiet {}".format(" ".join(names)))
 
     def get_installed_version(self, name):
         """Get installed package version."""
diff --git a/modoboa_installer/python.py b/modoboa_installer/python.py
index fc89cf6..784d3aa 100644
--- a/modoboa_installer/python.py
+++ b/modoboa_installer/python.py
@@ -60,8 +60,8 @@ def setup_virtualenv(path, sudo_user=None, python_version=2):
             packages.append("virtualenv")
     else:
         if utils.dist_name().startswith("centos"):
-            python_binary = "python36"
-            packages = ["python36"]
+            python_binary = "python3"
+            packages = ["python3"]
         else:
             python_binary = "python3"
             packages = ["python3-venv"]
diff --git a/modoboa_installer/scripts/automx.py b/modoboa_installer/scripts/automx.py
index 5c2c2d0..6564e7b 100644
--- a/modoboa_installer/scripts/automx.py
+++ b/modoboa_installer/scripts/automx.py
@@ -55,7 +55,8 @@ class Automx(base.Installer):
 
     def _setup_venv(self):
         """Prepare a python virtualenv."""
-        python.setup_virtualenv(self.venv_path, sudo_user=self.user)
+        python.setup_virtualenv(
+            self.venv_path, sudo_user=self.user, python_version=3)
         packages = [
             "future", "lxml", "ipaddress", "sqlalchemy", "python-memcached",
             "python-dateutil", "configparser"
diff --git a/modoboa_installer/scripts/base.py b/modoboa_installer/scripts/base.py
index d3f861f..e619d6f 100644
--- a/modoboa_installer/scripts/base.py
+++ b/modoboa_installer/scripts/base.py
@@ -1,6 +1,7 @@
 """Base classes."""
 
 import os
+import sys
 
 from .. import database
 from .. import package
@@ -107,7 +108,10 @@ class Installer(object):
         packages = self.get_packages()
         if not packages:
             return
-        package.backend.install_many(packages)
+        exitcode, output = package.backend.install_many(packages)
+        if exitcode:
+            utils.printcolor("Failed to install dependencies", utils.RED)
+            sys.exit(1)
 
     def get_config_files(self):
         """Return the list of configuration files to copy."""
diff --git a/modoboa_installer/scripts/files/uwsgi/automx.ini.tpl b/modoboa_installer/scripts/files/uwsgi/automx.ini.tpl
index f6ab23c..6f320b4 100644
--- a/modoboa_installer/scripts/files/uwsgi/automx.ini.tpl
+++ b/modoboa_installer/scripts/files/uwsgi/automx.ini.tpl
@@ -1,7 +1,7 @@
 [uwsgi]
 uid = %app_user
 gid = %app_user
-plugins = python
+plugins = %uwsgi_plugin
 home = %app_venv_path
 chdir = %app_instance_path
 module = automx_wsgi
diff --git a/modoboa_installer/scripts/files/uwsgi/modoboa.ini.tpl b/modoboa_installer/scripts/files/uwsgi/modoboa.ini.tpl
index a9f431e..cd76f33 100644
--- a/modoboa_installer/scripts/files/uwsgi/modoboa.ini.tpl
+++ b/modoboa_installer/scripts/files/uwsgi/modoboa.ini.tpl
@@ -1,7 +1,7 @@
 [uwsgi]
 uid = %app_user
 gid = %app_user
-plugins = python
+plugins = %uwsgi_plugin
 home = %app_venv_path
 chdir = %app_instance_path
 module = instance.wsgi:application
@@ -12,3 +12,4 @@ no-default-app = true
 socket = %uwsgi_socket_path
 chmod-socket = 660
 vacuum = true
+single-interpreter = True
diff --git a/modoboa_installer/scripts/modoboa.py b/modoboa_installer/scripts/modoboa.py
index 2c3a4df..2b63e05 100644
--- a/modoboa_installer/scripts/modoboa.py
+++ b/modoboa_installer/scripts/modoboa.py
@@ -22,12 +22,12 @@ class Modoboa(base.Installer):
     no_daemon = True
     packages = {
         "deb": [
-            "build-essential", "python-dev", "libxml2-dev", "libxslt-dev",
+            "build-essential", "python3-dev", "libxml2-dev", "libxslt-dev",
             "libjpeg-dev", "librrd-dev", "rrdtool", "libffi-dev", "cron",
             "libssl-dev"
         ],
         "rpm": [
-            "gcc", "gcc-c++", "python-devel", "libxml2-devel", "libxslt-devel",
+            "gcc", "gcc-c++", "python3-devel", "libxml2-devel", "libxslt-devel",
             "libjpeg-turbo-devel", "rrdtool-devel", "rrdtool", "libffi-devel",
         ]
     }
@@ -67,7 +67,8 @@ class Modoboa(base.Installer):
 
     def _setup_venv(self):
         """Prepare a dedicated virtualenv."""
-        python.setup_virtualenv(self.venv_path, sudo_user=self.user)
+        python.setup_virtualenv(
+            self.venv_path, sudo_user=self.user, python_version=3)
         packages = ["rrdtool"]
         version = self.config.get("modoboa", "version")
         if version == "latest":
diff --git a/modoboa_installer/scripts/uwsgi.py b/modoboa_installer/scripts/uwsgi.py
index 8fcbdbf..a20e865 100644
--- a/modoboa_installer/scripts/uwsgi.py
+++ b/modoboa_installer/scripts/uwsgi.py
@@ -16,8 +16,8 @@ class Uwsgi(base.Installer):
 
     appname = "uwsgi"
     packages = {
-        "deb": ["uwsgi", "uwsgi-plugin-python"],
-        "rpm": ["uwsgi", "uwsgi-plugin-python2"],
+        "deb": ["uwsgi", "uwsgi-plugin-python3"],
+        "rpm": ["uwsgi", "uwsgi-plugin-python36"],
     }
 
     def get_socket_path(self, app):
@@ -29,12 +29,17 @@ class Uwsgi(base.Installer):
     def get_template_context(self, app):
         """Additionnal variables."""
         context = super(Uwsgi, self).get_template_context()
+        if package.backend.FORMAT == "deb":
+            uwsgi_plugin = "python3"
+        else:
+            uwsgi_plugin = "python36"
         context.update({
             "app_user": self.config.get(app, "user"),
             "app_venv_path": self.config.get(app, "venv_path"),
             "app_instance_path": (
                 self.config.get(app, "instance_path")),
             "uwsgi_socket_path": self.get_socket_path(app),
+            "uwsgi_plugin": uwsgi_plugin,
         })
         return context