diff --git a/conf/config.inc.php.mysql b/conf/config.inc.php.mysql
deleted file mode 100644
index 1c6445c..0000000
--- a/conf/config.inc.php.mysql
+++ /dev/null
@@ -1,25 +0,0 @@
-<?php
-/*
-This is an example for your configuration file,
-read comments and replace the "blanks".
-You can then copy the file in GALETTE_CONFIG_PATH/config.inc.php
-
-$Id$
-*/
-
-/* choose your database engine, values : pgsql|mysql */
-define("TYPE_DB", "mysql"); 
-/* hostname for the database */
-define("HOST_DB", "localhost"); 
-/* tcp port for the database */
-define("PORT_DB", "3306"); 
-/* the username for the database */
-define("USER_DB", "__DB_USER__");
-/* password for the username define above */
-define("PWD_DB", "__DB_PWD__");
-/* the database name */
-define("NAME_DB", "__DB_NAME__");
-/* tables name prefix (default is galette_) */
-define("PREFIX_DB", "galette_");
-/* FIXME will disappear soon */
-define("STOCK_FILES", "tempimages");
diff --git a/doc/PRE_UPGRADE.md b/doc/PRE_UPGRADE.md
new file mode 100644
index 0000000..42026a9
--- /dev/null
+++ b/doc/PRE_UPGRADE.md
@@ -0,0 +1 @@
+if you were using a mysql DB, the new version only supports postgres and you should migrate it manually before upgrading.
\ No newline at end of file
diff --git a/manifest.toml b/manifest.toml
index e8dbdab..b723e4d 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -47,13 +47,6 @@ ram.runtime = "50M"
     [install.password]
     type = "password"
 
-    [install.database]
-    ask.en = "Choose SQL database you want"
-    ask.fr = "Choisissez la base de données SQL souhaitée"
-    type = "select"
-    choices = ["postgresql", "mysql"]
-    default = "postgresql"
-
 [resources]
         [resources.sources.main]
         url = "https://github.com/galette/galette/releases/download/1.0.0rc2/galette-1.0.0-rc2-20231017-a030a93d5e.tar.bz2"
@@ -68,13 +61,7 @@ ram.runtime = "50M"
     main.url = "/"
 
     [resources.apt]
-    packages = "php8.2-tidy, php8.2-intl, php8.2-mbstring, php8.2-xml, php8.2-gd, php8.2-curl"
+    packages = "postgresql, php8.2-tidy, php8.2-intl, php8.2-mbstring, php8.2-xml, php8.2-gd, php8.2-curl, php8.2-pgsql"
 
-    packages_from_raw_bash = """
-    if [[ "$database" == "mysql" ]]; then 
-        echo "mariadb-server, php8.2-mysql"
-            
-    elif [[ "$database" == "postgresql" ]]; then
-        echo "postgresql, postgresql-contrib, php8.2-pgsql"
-    fi
-    """
+    [resources.database]
+    type = "postgresql"
diff --git a/scripts/backup b/scripts/backup
index 5a923ea..52e78bc 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -44,15 +44,9 @@ ynh_backup --src_path="/etc/logrotate.d/$app"
 #=================================================
 # BACKUP THE SQL DATABASE
 #=================================================
+ynh_print_info --message="Backing up the PostgreSQL database..."
 
-if [ $database == "postgresql" ]
-then
-	ynh_print_info --message="Backing up the PostgreSQL database..."
-	ynh_psql_dump_db --database="$db_name" > db.sql
-else
-	ynh_print_info --message="Backing up the MySQL database..."
-	ynh_mysql_dump_db --database="$db_name" > db.sql
-fi
+ynh_psql_dump_db --database="$db_name" > db.sql
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/install b/scripts/install
index 949a71c..832147c 100644
--- a/scripts/install
+++ b/scripts/install
@@ -15,29 +15,6 @@ source /usr/share/yunohost/helpers
 
 timezone="$(cat /etc/timezone)"
 
-#=================================================
-# CREATE A SQL DATABASE
-#=================================================
-
-db_name=$(ynh_sanitize_dbid --db_name=$app)
-db_user=$db_name
-db_pwd=$(ynh_string_random --length=30)
-ynh_app_setting_set --app=$app --key=db_name --value=$db_name
-ynh_app_setting_set --app=$app --key=db_user --value=$db_user
-ynh_app_setting_set --app=$app --key=db_pwd --value=$db_pwd
-
-if [ $database == "postgresql" ]
-then
-	ynh_script_progression --message="Creating a PostgreSQL database..." --weight=2
-	ynh_psql_test_if_first_run
-	ynh_psql_setup_db --db_user=$db_user --db_name=$db_name
-	ynh_app_setting_set --app=$app --key=db_pwd --value=$db_pwd
-else
-	ynh_script_progression --message="Creating a MySQL database..." --weight=2
-	ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name
-	ynh_app_setting_set --app=$app --key=db_pwd --value=$db_pwd
-fi
-
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -84,12 +61,7 @@ ynh_script_progression --message="Setuping application with CURL..."
 ynh_script_progression --message="Finalizing installation..."
 ynh_local_curl "/installer.php" "install_permsok=1"
 ynh_local_curl "/installer.php"  "install_type=i"
-if [ $database == "postgresql" ]
-then
-	ynh_local_curl "/installer.php"  "install_dbtype=pgsql" "install_dbhost=localhost" "install_dbport=5432" "install_dbuser=$db_user" "install_dbpass=$db_pwd" "install_dbname=$db_name" "install_dbprefix=galette_"
-else
-	ynh_local_curl "/installer.php"  "install_dbtype=mysql" "install_dbhost=localhost" "install_dbport=3306" "install_dbuser=$db_user" "install_dbpass=$db_pwd" "install_dbname=$db_name" "install_dbprefix=galette_"
-fi
+ynh_local_curl "/installer.php"  "install_dbtype=pgsql" "install_dbhost=localhost" "install_dbport=5432" "install_dbuser=$db_user" "install_dbpass=$db_pwd" "install_dbname=$db_name" "install_dbprefix=galette_"
 ynh_local_curl "/installer.php"  "install_dbperms_ok=1"
 ynh_local_curl "/installer.php"  "install_dbwrite_ok=1"
 ynh_local_curl "/installer.php"  "install_adminlogin=$admin" "install_adminpass=$password" "install_adminpass_verif=$password"
diff --git a/scripts/remove b/scripts/remove
index 0f5e210..7a8278f 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -23,14 +23,6 @@ ynh_remove_nginx_config
 # Remove the dedicated PHP-FPM config
 ynh_remove_fpm_config
 
-if [ $database == "postgresql" ]
-then
-	ynh_script_progression --message="Removing PostgreSQL database..." --weight=2
-	ynh_psql_remove_db --db_user=$db_user --db_name=$db_name
-else
-	ynh_script_progression --message="Removing MySQL database..." --weight=2
-	ynh_mysql_remove_db --db_user=$db_user --db_name=$db_name
-fi
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index f537eb7..374a644 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -27,21 +27,11 @@ chmod -R o-rwx "$install_dir"
 chown -R $app:www-data "$install_dir"
 
 #=================================================
-# RESTORE THE SQL DATABASE
+# RESTORE THE POSTGRESQL DATABASE
 #=================================================
+ynh_script_progression --message="Restoring the PostgreSQL database..." --weight=1
 
-db_name=$(ynh_app_setting_get --app=$app --key=db_name)
-db_user=$db_name
-db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)
-
-if [ $database == "postgresql" ]
-then
-	 ynh_psql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
-	ynh_psql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./db.sql
-else
-	ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
-	ynh_mysql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./db.sql
-fi
+ynh_psql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./db.sql
 
 #=================================================
 # RESTORE SYSTEM CONFIGURATIONS
diff --git a/scripts/upgrade b/scripts/upgrade
index 8bda4ba..64444cd 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -29,20 +29,7 @@ if [ "$upgrade_type" == "UPGRADE_APP" ]
 then
 	ynh_script_progression --message="Upgrading source files..."
 
-	# Download, check integrity, uncompress and patch the source from app.src
-	#mv "$install_dir" "$install_dir.old"
-
 	ynh_setup_source --dest_dir="$install_dir" --keep="galette/config/config.inc.php galette/data galette/plugins"
-
-	# when running automatic tests, there is no config.inc.php
-	#if [ -e "$install_dir.old/galette/config/config.inc.php" ]; then
-	#    cp "$install_dir.old/galette/config/config.inc.php" "$install_dir/galette/config/config.inc.php"
-	#    cp -r "$install_dir.old/galette/data" "$install_dir/galette/data"
-	#    cp -r "$install_dir.old/galette/plugins" "$install_dir/galette/plugins"
-	#fi
-
-	# delete temp directory
-	#ynh_secure_remove "$install_dir.old"
 fi
 
 chmod -R o-rwx "$install_dir"
diff --git a/tests.toml b/tests.toml
index 1966c23..3ecfeb8 100644
--- a/tests.toml
+++ b/tests.toml
@@ -6,13 +6,8 @@ test_format = 1.0
     # Default args to use for install
     # -------------------------------
 
-    args.database="postgresql"
 
     # -------------------------------
     # Commits to test upgrade from
     # -------------------------------
 
-	[mysql_test]
-
-    only = ["install.subdir", "backup_restore", "upgrade" ]
-    args.database = "mysql"