diff --git a/.travis.yml b/.travis.yml
index e6d7540..fb99072 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,7 @@ sudo: false
 # docker-based travis builds
 language: python
 python:
-- "2.7"
+- "3.7"
 services:
 - mysql
 compiler:
diff --git a/ci/run.py b/ci/run.py
index 7b8b931..926f426 100755
--- a/ci/run.py
+++ b/ci/run.py
@@ -154,7 +154,7 @@ class SeafileServer(Project):
 
 
 def fetch_and_build():
-    libsearpc = Project('libsearpc')
+    libsearpc = Libsearpc()
     ccnet = CcnetServer()
     seafile = SeafileServer()
 
diff --git a/ci/serverctl.py b/ci/serverctl.py
index fa3f8ec..98f6b31 100755
--- a/ci/serverctl.py
+++ b/ci/serverctl.py
@@ -226,6 +226,7 @@ connection_charset = utf8
             self.seafile_conf_dir,
             "-l",
             self.seafile_log,
+            "-f",
         ]
         self.seafile_proc = shell(cmd, wait=False)
 
@@ -248,7 +249,7 @@ connection_charset = utf8
 
 
 def create_mysql_dbs():
-    sql = '''\
+    sql = b'''\
 create database `ccnet` character set = 'utf8';
 create database `seafile` character set = 'utf8';
 
diff --git a/scripts/breakpad.py b/scripts/breakpad.py
index f926f6f..b682b85 100755
--- a/scripts/breakpad.py
+++ b/scripts/breakpad.py
@@ -7,7 +7,6 @@ The directory is ./symbols/seaf-daemon.exe/${symbol_id}/seaf-daemon.exe.sym,
 where symbol_id is the first line of the "dump_syms" output.
 """
 
-from __future__ import print_function
 import os
 from os.path import abspath, basename, exists, dirname, join
 import re
diff --git a/scripts/build/build-server.py b/scripts/build/build-server.py
index 308c177..12379c4 100755
--- a/scripts/build/build-server.py
+++ b/scripts/build/build-server.py
@@ -14,24 +14,7 @@ a directory before running this script. That directory is passed in as the
 '--thirdpartdir' arguments.
 
 '''
-from __future__ import print_function
-
-from future import standard_library
-standard_library.install_aliases()
-from builtins import input
-from builtins import object
 import sys
-
-####################
-### Requires Python 2.6+
-####################
-if sys.version_info[0] == 3:
-    print('Python 3 not supported yet. Quit now.')
-    sys.exit(1)
-if sys.version_info[1] < 6:
-    print('Python 2.6 or above is required. Quit now.')
-    sys.exit(1)
-
 import os
 import glob
 import subprocess
diff --git a/scripts/check_init_admin.py b/scripts/check_init_admin.py
index a3e8cce..a49f901 100644
--- a/scripts/check_init_admin.py
+++ b/scripts/check_init_admin.py
@@ -1,12 +1,6 @@
 #coding: UTF-8
 
 '''This script would check if there is admin, and prompt the user to create a new one if non exist'''
-from __future__ import print_function
-
-from future import standard_library
-standard_library.install_aliases()
-from builtins import input
-from builtins import object
 import json
 import sys
 import os
diff --git a/scripts/docs-upgrade/db_update_helper.py b/scripts/docs-upgrade/db_update_helper.py
index 08be8df..88d3784 100644
--- a/scripts/docs-upgrade/db_update_helper.py
+++ b/scripts/docs-upgrade/db_update_helper.py
@@ -1,10 +1,5 @@
 # coding: UTF-8
 
-from __future__ import print_function
-from future import standard_library
-standard_library.install_aliases()
-from builtins import str
-from builtins import object
 import sys
 import os
 import configparser
diff --git a/scripts/seafobj_migrate.py b/scripts/seafobj_migrate.py
index 2b2db58..0e92830 100755
--- a/scripts/seafobj_migrate.py
+++ b/scripts/seafobj_migrate.py
@@ -1,10 +1,6 @@
 #!/usr/bin/env python
 #coding: utf-8
 
-from future import standard_library
-standard_library.install_aliases()
-from builtins import range
-from builtins import object
 import os
 import sys
 import logging
diff --git a/scripts/setup-seafile-mysql.py b/scripts/setup-seafile-mysql.py
index 08bd7f0..2e7b9ab 100644
--- a/scripts/setup-seafile-mysql.py
+++ b/scripts/setup-seafile-mysql.py
@@ -1,13 +1,6 @@
 #coding: UTF-8
 
 '''This script would guide the seafile admin to setup seafile with MySQL'''
-from __future__ import print_function
-
-from future import standard_library
-standard_library.install_aliases()
-from builtins import str
-from builtins import input
-from builtins import object
 import argparse
 import sys
 import os
diff --git a/scripts/sqlite2mysql.py b/scripts/sqlite2mysql.py
index f87596a..9e9c2e2 100644
--- a/scripts/sqlite2mysql.py
+++ b/scripts/sqlite2mysql.py
@@ -11,8 +11,6 @@ Then you can import the .sql file into MySql
 
 Note - you need to add foreign key constrains manually since sqlite doesn't actually support them
 """
-from __future__ import print_function
-
 import re
 import fileinput