diff --git a/doc/manual_installation/dovecot.rst b/doc/manual_installation/dovecot.rst
index 7c7a1eb1c..f0e5a8227 100644
--- a/doc/manual_installation/dovecot.rst
+++ b/doc/manual_installation/dovecot.rst
@@ -34,7 +34,7 @@ Then, edit the ``inbox`` namespace and add the following line::
 
   inbox = yes
 
-In order for dovecot to automaticaly create ususal folder on account creation, edit the ``inbox`` namespace of :file:`15-mailboxes.conf`::
+In order for dovecot to automaticaly create usual folders on account creation, edit the ``inbox`` namespace of :file:`15-mailboxes.conf`::
 
   mailbox Drafts {
     auto = subscribe
diff --git a/doc/manual_installation/modoboa.rst b/doc/manual_installation/modoboa.rst
index 239196fef..66b1df231 100644
--- a/doc/manual_installation/modoboa.rst
+++ b/doc/manual_installation/modoboa.rst
@@ -106,12 +106,10 @@ Install the corresponding Python binding:
    (env)$ pip install psycopg[binary]>=3.1
 
 .. note::
-
-   Alternatively, you can install the ``python3-psycopg2`` package instead on
-   Debian-based distributions if your virtual environment was created with
-   ``--system-site-packages`` option.
-   Note that psycopg 3.1 is required starting with modoboa 2.2.0 and
-   ubuntu and debian packages are too old for now.
+   Ubuntu and Debian repositories contain python-psycopgX package
+   but starting modoboa 2.2.0 minimum version required is 3.1 and
+   it has not yet it these distro yet
+   Prior modoboa version can run with ``python3-psycopg2``.
 
 Then, create a user and a database. For example, to create the ``modoboa``
 database owned by a ``modoboa`` user, run the following commands on your
@@ -175,8 +173,8 @@ you just have to run the following command:
    If you choose to install extensions one at a time, you will have to
    add their names in settings.py to ``MODOBOA_APPS``. Also ensure that
    you have the line ``from modoboa_amavis.settings import *`` at the
-   end of this file and possibly perform more steps. Check the manuall
-   of each extensions for specific Instructions.
+   end of this file and possibly perform more steps. Check the
+   documentation/readme of each extensions for specific Instructions.
 
    The list of available extensions can be found on the :doc:`index
    page <../index>`. Instructions to install them are available on
diff --git a/doc/manual_installation/webserver.rst b/doc/manual_installation/webserver.rst
index c885964fb..7badb4f2c 100644
--- a/doc/manual_installation/webserver.rst
+++ b/doc/manual_installation/webserver.rst
@@ -117,6 +117,7 @@ Recommend packages for debian and derivatives::
   apt install uwsgi uwsgi-plugin-python3
 
 Here is a sample nginx configuration::
+
   upstream modoboa {
     server unix:<uwsgi_socket_path> fail_timeout=0;
   }
@@ -208,7 +209,7 @@ not be completely self-explanatory:
   media directories are because otherwise nginx won't be able to find
   them.
 
-  If Modoboa is at the root of your domain, then ``<hostnamel>``
+  If Modoboa is at the root of your domain, then ``<hostname>``
   is an empty string and can be deleted from the configuration
   above. In this case, you probably do not need the ``alias``
   directives.