diff --git a/conf/traccar.xml b/conf/traccar.xml
index 722e6c4..a7e89a8 100644
--- a/conf/traccar.xml
+++ b/conf/traccar.xml
@@ -18,8 +18,8 @@
 
     -->
 
-    <entry key='database.driver'>com.mysql.cj.jdbc.Driver</entry>
-    <entry key='database.url'>jdbc:mysql://localhost/__DB_NAME__?zeroDateTimeBehavior=round&amp;serverTimezone=UTC&amp;allowPublicKeyRetrieval=true&amp;useSSL=false&amp;allowMultiQueries=true&amp;autoReconnect=true&amp;useUnicode=yes&amp;characterEncoding=UTF-8&amp;sessionVariables=sql_mode=''</entry>
+    <entry key='database.driver'>org.postgresql.Driver</entry>
+    <entry key='database.url'>jdbc:postgresql://localhost/__DB_NAME__</entry>
     <entry key='database.user'>__DB_USER__</entry>
     <entry key='database.password'>__DB_PWD__</entry>
 
@@ -34,6 +34,8 @@
     <entry key='mail.smtp.starttls.enable'>false</entry> 
     <entry key='mail.smtp.username'>__APP__</entry> 
     <entry key='mail.smtp.password'>__MAIL_PWD__</entry>
+    <entry key='mail.smtp.from'>__APP__@__MAIN_DOMAIN__</entry>
+
     <!--
     <entry key='ldap.url'>ldap://127.0.0.1</entry>
     <entry key='ldap.port'>389</entry>
diff --git a/doc/screenshots/screenshot.png b/doc/screenshots/screenshot.png
index c7941f6..89b5267 100644
Binary files a/doc/screenshots/screenshot.png and b/doc/screenshots/screenshot.png differ
diff --git a/manifest.toml b/manifest.toml
index de39b05..9de49cb 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -67,7 +67,7 @@ ram.runtime = "50M"
     [resources.ports]
 
     [resources.apt]
-    packages = "mariadb-server, openjdk-11-jre-headless"
+    packages = "postgresql, openjdk-11-jre-headless"
 
     [resources.database]
-    type = "mysql"
+    type = "postgresql"
diff --git a/scripts/backup b/scripts/backup
index 4606e12..d23c6d7 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -41,11 +41,11 @@ ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 ynh_backup --src_path="/etc/systemd/system/$app.service"
 
 #=================================================
-# BACKUP THE MYSQL DATABASE
+# BACKUP THE SQL DATABASE
 #=================================================
-ynh_print_info --message="Backing up the MySQL database..."
+ynh_print_info --message="Backing up the PostgreSQL database..."
 
-ynh_mysql_dump_db --database="$db_name" > db.sql
+ynh_psql_dump_db --database="$db_name" > db.sql
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/install b/scripts/install
index 326b105..0c9cbc2 100755
--- a/scripts/install
+++ b/scripts/install
@@ -9,6 +9,8 @@
 source _common.sh
 source /usr/share/yunohost/helpers
 
+main_domain=$(cat /etc/yunohost/current_host)
+
 #=================================================
 # APP "BUILD" (DEPLOYING SOURCES, VENV, COMPILING ETC)
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 6924ac7..55ad448 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -31,11 +31,11 @@ ynh_restore_file --origin_path="$data_dir" --not_mandatory
 chown -R $app:www-data "$data_dir"
 
 #=================================================
-# RESTORE THE MYSQL DATABASE
+# RESTORE THE POSTGRESQL DATABASE
 #=================================================
-ynh_script_progression --message="Restoring the MySQL database..." --weight=1
+ynh_script_progression --message="Restoring the PostgreSQL database..." --weight=1
 
-ynh_mysql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./db.sql
+ynh_psql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./db.sql
 
 #=================================================
 # RESTORE SYSTEM CONFIGURATIONS