diff --git a/scripts/install b/scripts/install
index 1e7d764..91d9338 100755
--- a/scripts/install
+++ b/scripts/install
@@ -207,7 +207,7 @@ virtualenv "${final_path}/venv"
 #=================================================
 db_pwd=$(ynh_app_setting_get "$app" psqlpwd)
 admin_mail=$(ynh_user_get_info "$admin" mail)
-key=$(ynh_string_random)
+key=$(ynh_string_random 50)
 memc_port=$(ynh_find_port 8080)
 settings="$final_path/venv/lib/python2.7/site-packages/weblate/settings.py"
 cp "../conf/settings_history/settings.$current_version.py" "$settings"
diff --git a/scripts/upgrade b/scripts/upgrade
index c7710e0..bf0fdbd 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -27,7 +27,7 @@ admin_mail=$(ynh_user_get_info "$admin" mail)
 memc_port=$(ynh_app_setting_get "$app" memc_port)
 github_account=$(ynh_app_setting_get "$app" github_account)
 migration311=$(ynh_app_setting_get "$app" migration311)
-key=$(ynh_string_random)
+key=$(ynh_string_random 50)
 
 #=================================================
 # Get previous version number