diff --git a/scripts/_common.sh b/scripts/_common.sh
index d1b85e1..3357689 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -5,7 +5,7 @@
 #=================================================
 
 # dependencies used by the app (must be on a single line)
-pkg_dependencies="git curl python3 python3-pip python3-venv libpq-dev libsasl2-dev python3-dev libssl-dev"
+pkg_dependencies="git curl python3 python3-pip python3-venv libpq-dev libsasl2-dev python3-dev libssl-dev libffi-dev python3-cffi"
 
 #=================================================
 # PERSONAL HELPERS
diff --git a/scripts/install b/scripts/install
index 0e6f509..230deb8 100755
--- a/scripts/install
+++ b/scripts/install
@@ -110,6 +110,9 @@ ynh_add_nginx_config
 
 pushd $final_path
 	ynh_exec_as $app python3 -m venv $final_path/venv
+	ynh_exec_as $app "$final_path/venv/bin/pip" install --upgrade pip
+	ynh_exec_as $app "$final_path/venv/bin/pip" install --upgrade setuptools
+	ynh_exec_as $app "$final_path/venv/bin/pip" install --upgrade MarkupSafe
 	ynh_exec_as $app "$final_path/venv/bin/pip" install isso gunicorn
 popd