diff --git a/Dockerfile b/Dockerfile
index 6571c7c..c7c6645 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,6 +22,7 @@ RUN echo "@community https://nl.alpinelinux.org/alpine/v3.7/community" >> /etc/a
     php7@community \
     php7-fpm@community \
     php7-imap@community \
+    php7-pgsql@community \
     php7-mysqli@community \
     php7-session@community \
     php7-mbstring@community \
diff --git a/README.md b/README.md
index fe6cc0e..1d3cf8a 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ PostfixAdmin is a web based interface used to manage mailboxes, virtual domains
 - Lightweight & secure image (no root process)
 - Based on Alpine Linux
 - Latest Postfixadmin version (3.1)
-- MySQL/Mariadb driver
+- MariaDB/PostgreSQL driver
 - With PHP7
 
 ### Built-time variables
@@ -30,10 +30,12 @@ PostfixAdmin is a web based interface used to manage mailboxes, virtual domains
 | -------- | ----------- | ---- | ------------- |
 | **UID** | postfixadmin user id | *optional* | 991
 | **GID** | postfixadmin group id | *optional* | 991
-| **DBHOST** | MariaDB instance ip/hostname | *optional* | mariadb
-| **DBUSER** | MariaDB database username | *optional* | postfix
-| **DBNAME** | MariaDB database name | *optional* | postfix
-| **DBPASS** | MariaDB database password or location of a file containing it | **required** | null
+| **DBDRIVER** | Database type: mysql, pgsql | optional | mysql
+| **DBHOST** | Database instance ip/hostname | *optional* | mariadb
+| **DBPORT** | Database instance port **DOES NOT WORK ON MYSQL FOR NOW** | optional | 3306
+| **DBUSER** | Database database username | *optional* | postfix
+| **DBNAME** | Database database name | *optional* | postfix
+| **DBPASS** | Database database password or location of a file containing it | **required** | null
 | **SMTPHOST** | SMTP server ip/hostname | *optional* | mailserver
 | **DOMAIN** | Mail domain | *optional* | `domainname` value
 | **ENCRYPTION** | Passwords encryption method | *optional* | `dovecot:SHA512-CRYPT`
@@ -56,7 +58,7 @@ postfixadmin:
     - DBPASS=xxxxxxx
   depends_on:
     - mailserver
-    - mariadb
+    - mariadb # postgres (adjust accordingly)
 ```
 
 ### How to setup
diff --git a/bin/run.sh b/bin/run.sh
index 4eea6db..04e380a 100644
--- a/bin/run.sh
+++ b/bin/run.sh
@@ -3,7 +3,9 @@
 GID=${GID:-991}
 UID=${UID:-991}
 DOMAIN=${DOMAIN:-$(hostname --domain)}
+DBDRIVER=${DBDRIVER:-mysql}
 DBHOST=${DBHOST:-mariadb}
+DBPORT=${DBPORT:-3306}
 DBUSER=${DBUSER:-postfix}
 DBNAME=${DBNAME:-postfix}
 DBPASS=$([ -f "$DBPASS" ] && cat "$DBPASS" || echo "${DBPASS:-}")
@@ -15,7 +17,7 @@ PASSVAL_MIN_CHAR=${PASSVAL_MIN_CHAR:-3}
 PASSVAL_MIN_DIGIT=${PASSVAL_MIN_DIGIT:-2}
 
 if [ -z "$DBPASS" ]; then
-  echo "Mariadb database password must be set !"
+  echo "MariaDB/PostgreSQL database password must be set !"
   exit 1
 fi
 
@@ -25,16 +27,22 @@ mkdir -p /postfixadmin/templates_c
 # Set permissions
 chown -R $UID:$GID /postfixadmin
 
+# MySQL/MariaDB should use mysqli driver
+case "$DBDRIVER" in
+  mysql) DBDRIVER=mysqli;
+esac
+
 # Local postfixadmin configuration file
 cat > /postfixadmin/config.local.php <<EOF
 <?php
 \$CONF['configured'] = true;
 
-\$CONF['database_type'] = 'mysqli';
+\$CONF['database_type'] = '${DBDRIVER}';
 \$CONF['database_host'] = '${DBHOST}';
 \$CONF['database_user'] = '${DBUSER}';
 \$CONF['database_password'] = '${DBPASS}';
 \$CONF['database_name'] = '${DBNAME}';
+\$CONF['database_port'] = '${DBPORT}';
 
 \$CONF['encrypt'] = '${ENCRYPTION}';
 \$CONF['dovecotpw'] = "/usr/bin/doveadm pw";