diff --git a/conf/.sequelizerc.example b/conf/.sequelizerc.example
index 45ef120..29b59f2 100644
--- a/conf/.sequelizerc.example
+++ b/conf/.sequelizerc.example
@@ -4,5 +4,5 @@ module.exports = {
     'config':          path.resolve('config.json'),
     'migrations-path': path.resolve('lib', 'migrations'),
     'models-path':     path.resolve('lib', 'models'),
-    'url':             'postgres://__DB_USER__:__DB_PASS__@localhost:5432/__DB_NAME__'
+    'url':             'mysql://__DB_USER__:__DB_PASS__@localhost:3306/__DB_NAME__'
 }
diff --git a/conf/config.json.example b/conf/config.json.example
index a6dc5a0..52a4cd3 100644
--- a/conf/config.json.example
+++ b/conf/config.json.example
@@ -27,8 +27,8 @@
             "password": "__DB_PASS__",
             "database": "__DB_NAME__",
             "host": "localhost",
-            "port": "5432",
-            "dialect": "postgres"
+            "port": "3306",
+            "dialect": "mysql"
         }
     }
-}
+}
\ No newline at end of file
diff --git a/scripts/_common.sh b/scripts/_common.sh
index b113120..53e412e 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -5,7 +5,7 @@
 #=================================================
 
 # dependencies used by the app
-pkg_dependencies="postgresql apt-transport-https"
+pkg_dependencies="apt-transport-https"
 
 nodejs_version="10"
 
diff --git a/scripts/backup b/scripts/backup
index 1033992..5dff667 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -50,11 +50,11 @@ ynh_backup --src_path="$final_path"
 ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 
 #=================================================
-# BACKUP THE DATABASE
+# BACKUP THE MYSQL DATABASE
 #=================================================
 ynh_print_info --message="Backing up the database..."
 
-ynh_psql_dump_db --database="$db_name" > db.sql
+ynh_mysql_dump_db --database="$db_name" > db.sql
 
 #=================================================
 # SPECIFIC BACKUP
diff --git a/scripts/install b/scripts/install
index 83fdb4d..050bd6a 100644
--- a/scripts/install
+++ b/scripts/install
@@ -80,10 +80,8 @@ ynh_script_progression --message="Creating a database..." --weight=2
 
 db_name=$(ynh_sanitize_dbid --db_name=$app)
 db_user=$db_name
-
-ynh_psql_test_if_first_run
 ynh_app_setting_set --app="$app" --key="db_name" --value="$db_name"
-ynh_psql_setup_db --db_user="$db_user" --db_name="$db_name"
+ynh_mysql_setup_db --db_user="$db_user" --db_name="$db_name"
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
diff --git a/scripts/remove b/scripts/remove
index 512eea8..f00aabe 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -34,12 +34,12 @@ ynh_script_progression --message="Stopping and removing the systemd service..."
 ynh_remove_systemd_config
 
 #=================================================
-# REMOVE THE DATABASE
+# REMOVE THE MYSQL DATABASE
 #=================================================
-ynh_script_progression --message="Removing the database..." --weight=2
+ynh_script_progression --message="Removing the MySQL database..." --weight=2
 
 # Remove a database if it exists, along with the associated user
-ynh_psql_remove_db --db_user=$db_user --db_name=$db_name
+ynh_mysql_remove_db --db_user=$db_user --db_name=$db_name
 
 #=================================================
 # REMOVE DEPENDENCIES
diff --git a/scripts/restore b/scripts/restore
index caf90d2..10c5513 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -89,13 +89,13 @@ ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ st
 ynh_exec_warn_less ynh_install_nodejs --nodejs_version="$nodejs_version"
 
 #=================================================
-# RESTORE THE DATABASE
+# RESTORE THE MYSQL DATABASE
 #=================================================
-ynh_script_progression --message="Restoring the database..." --weight=6
+ynh_script_progression --message="Restoring the MySQL database..." --weight=6
 
-db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
-ynh_psql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
-ynh_psql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./db.sql
+db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
+ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
+ynh_mysql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./db.sql
 
 #=================================================
 # RESTORE SYSTEMD
diff --git a/scripts/upgrade b/scripts/upgrade
index b275458..440d42f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -24,7 +24,7 @@ port=$(ynh_app_setting_get --app=$app --key=port)
 
 db_name=$(ynh_app_setting_get --app=$app --key=app)
 db_user=$(ynh_app_setting_get --app=$app --key=app)
-db_pwd=$(ynh_app_setting_get --app=$app --key=psqlwd)
+db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
 
 #=================================================
 # CHECK VERSION