diff --git a/README.md b/README.md
index 3c90205..57cf349 100644
--- a/README.md
+++ b/README.md
@@ -1,11 +1,11 @@
 # YOURLS for YunoHost
 
 [![Integration level](https://dash.yunohost.org/integration/yourls.svg)](https://dash.yunohost.org/appci/app/yourls) ![](https://ci-apps.yunohost.org/ci/badges/yourls.status.svg) ![](https://ci-apps.yunohost.org/ci/badges/yourls.maintain.svg)  
-[![Install yourls with YunoHost](https://install-app.yunohost.org/install-with-yunohost.png)](https://install-app.yunohost.org/?app=yourls)
+[![Install YOURLS with YunoHost](https://install-app.yunohost.org/install-with-yunohost.png)](https://install-app.yunohost.org/?app=yourls)
 
 *[Lire ce readme en français.](./README_fr.md)*
 
-> *This package allows you to install Yourls quickly and simply on a YunoHost server.  
+> *This package allows you to install YOURLS quickly and simply on a YunoHost server.  
 If you don't have YunoHost, please consult [the guide](https://yunohost.org/#/install) to learn how to install it.*
 
 ## Overview
diff --git a/scripts/upgrade b/scripts/upgrade
index 2b8582b..23b96ac 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -109,11 +109,29 @@ ynh_script_progression --message="Upgrading PHP-FPM configuration..." --weight=4
 # Create a dedicated PHP-FPM config
 ynh_add_fpm_config --phpversion=$YNH_PHP_VERSION --package="$extra_php_dependencies"
 
+#=================================================
+# MODIFY A CONFIG FILE
+#=================================================
+ynh_script_progression --message="Modifying a config file..." --weight=2
+
 # Verify the checksum and backup the file if it's different
 ynh_backup_if_checksum_is_different --file="$final_path/user/config.php"
+
+sudo cp ../conf/config.php $final_path/user/config.php
+
+ynh_replace_string --match_string="__DB_NAME__" --replace_string="$db_name" --target_file="$final_path/user/config.php"
+ynh_replace_string --match_string="__DB_PASSWORD__" --replace_string="$db_pwd" --target_file="$final_path/user/config.php"
+ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="$final_path/user/config.php"
+ynh_replace_string --match_string="__PATH__" --replace_string="${path_url%/}" --target_file="$final_path/user/config.php"
+ynh_replace_string --match_string="__RANDOM__" --replace_string="$(ynh_string_random 24)" --target_file="$final_path/user/config.php"
+
 # Recalculate and store the config file checksum into the app settings
 ynh_store_file_checksum --file="$final_path/user/config.php"
 
+#=================================================
+# SECURE FILES AND DIRECTORIES
+#=================================================
+
 # Set right permissions for curl installation
 chown -R $app: $final_path