diff --git a/common/db-wrapper/db-wrapper.c b/common/db-wrapper/db-wrapper.c
index d434145..4757aca 100644
--- a/common/db-wrapper/db-wrapper.c
+++ b/common/db-wrapper/db-wrapper.c
@@ -95,6 +95,7 @@ db_conn_pool_new_mysql (const char *host,
 
 DBConnPool *
 db_conn_pool_new_pgsql (const char *host,
+                        unsigned int port,
                         const char *user,
                         const char *password,
                         const char *db_name,
@@ -124,7 +125,7 @@ db_conn_pool_new_pgsql (const char *host,
 
     DBConnPool *pool;
 
-    pool = pgsql_db_conn_pool_new (host, user, password, db_name, unix_socket);
+    pool = pgsql_db_conn_pool_new (host, port, user, password, db_name, unix_socket);
     init_conn_pool_common (pool, max_connections);
 
     return pool;
diff --git a/common/db-wrapper/db-wrapper.h b/common/db-wrapper/db-wrapper.h
index 8345b53..18bfaa9 100644
--- a/common/db-wrapper/db-wrapper.h
+++ b/common/db-wrapper/db-wrapper.h
@@ -29,6 +29,7 @@ db_conn_pool_new_mysql (const char *host,
 
 DBConnPool *
 db_conn_pool_new_pgsql (const char *host,
+                        unsigned int port,
                         const char *user,
                         const char *password,
                         const char *db_name,
diff --git a/common/db-wrapper/pgsql-db-ops.c b/common/db-wrapper/pgsql-db-ops.c
index 9ec69a6..75c7249 100644
--- a/common/db-wrapper/pgsql-db-ops.c
+++ b/common/db-wrapper/pgsql-db-ops.c
@@ -8,6 +8,7 @@
 typedef struct PGDBConnPool {
     DBConnPool parent;
     char *host;
+    unsigned int port;
     char *user;
     char *password;
     char *db_name;
@@ -16,6 +17,7 @@ typedef struct PGDBConnPool {
 
 DBConnPool *
 pgsql_db_conn_pool_new (const char *host,
+                        unsigned int port,
                         const char *user,
                         const char *password,
                         const char *db_name,
@@ -24,6 +26,7 @@ pgsql_db_conn_pool_new (const char *host,
     PGDBConnPool *pool = g_new0 (PGDBConnPool, 1);
 
     pool->host = g_strdup (host);
+    pool->port = port;
     pool->user = g_strdup (user);
     pool->password = g_strdup (password);
     pool->db_name = g_strdup(db_name);
@@ -88,8 +91,12 @@ connect_pgsql (PGDBConnPool *pool, GError **error)
         g_string_append_printf (buf, "host='%s' ", pool->host);
     }
 
-    g_string_append_printf (buf, "dbname='%s' ", pool->db_name);
+    if (pool->port > 0) {
+        g_string_append_printf (buf, "port=%u ", pool->port);
+    }
 
+    g_string_append_printf (buf, "dbname='%s' ", pool->db_name);
+    
     db = PQconnectdb (buf->str);
     if (PQstatus (db) != CONNECTION_OK) {
         g_set_error (error, SEAF_DB_ERROR_DOMAIN, SEAF_DB_ERROR_CODE,
diff --git a/common/db-wrapper/pgsql-db-ops.h b/common/db-wrapper/pgsql-db-ops.h
index c8e884e..f027aec 100644
--- a/common/db-wrapper/pgsql-db-ops.h
+++ b/common/db-wrapper/pgsql-db-ops.h
@@ -3,6 +3,7 @@
 
 DBConnPool *
 pgsql_db_conn_pool_new (const char *host,
+                        unsigned int port,
                         const char *user,
                         const char *password,
                         const char *db_name,
diff --git a/common/seaf-db.c b/common/seaf-db.c
index 135ff61..7684ef6 100644
--- a/common/seaf-db.c
+++ b/common/seaf-db.c
@@ -56,6 +56,7 @@ seaf_db_new_mysql (const char *host,
 
 SeafDB *
 seaf_db_new_pgsql (const char *host,
+                   unsigned int port,
                    const char *user,
                    const char *passwd,
                    const char *db_name,
@@ -72,7 +73,7 @@ seaf_db_new_pgsql (const char *host,
 
     db->type = SEAF_DB_TYPE_PGSQL;
 
-    db->pool = db_conn_pool_new_pgsql (host, user, passwd, db_name, unix_socket,
+    db->pool = db_conn_pool_new_pgsql (host, port, user, passwd, db_name, unix_socket,
                                        max_connections);
 
     return db;
diff --git a/common/seaf-db.h b/common/seaf-db.h
index e4d10c3..db46074 100644
--- a/common/seaf-db.h
+++ b/common/seaf-db.h
@@ -26,6 +26,7 @@ seaf_db_new_mysql (const char *host,
 
 SeafDB *
 seaf_db_new_pgsql (const char *host,
+                   unsigned int port,
                    const char *user,
                    const char *passwd,
                    const char *db_name,
diff --git a/common/seaf-utils.c b/common/seaf-utils.c
index 393aea1..e59176e 100644
--- a/common/seaf-utils.c
+++ b/common/seaf-utils.c
@@ -134,6 +134,7 @@ static int
 pgsql_db_start (SeafileSession *session)
 {
     char *host, *user, *passwd, *db, *unix_socket;
+    unsigned int port;
     GError *error = NULL;
 
     host = seaf_key_file_get_string (session->config, "database", "host", &error);
@@ -159,11 +160,17 @@ pgsql_db_start (SeafileSession *session)
         seaf_warning ("DB name not set in config.\n");
         return -1;
     }
+    port = g_key_file_get_integer (session->config,
+                                   "database", "port", &error);
+    if (error) {
+        port = 0;
+        g_clear_error (&error);
+    }
 
     unix_socket = seaf_key_file_get_string (session->config,
                                          "database", "unix_socket", &error);
 
-    session->db = seaf_db_new_pgsql (host, user, passwd, db, unix_socket,
+    session->db = seaf_db_new_pgsql (host, port, user, passwd, db, unix_socket,
                                      DEFAULT_MAX_CONNECTIONS);
     if (!session->db) {
         seaf_warning ("Failed to start pgsql db.\n");