diff --git a/.gitignore b/.gitignore
index be9256a..faa8310 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,9 @@
-.venv
 build
 dist
 venv
+*.pyc
+*.egg-info
+__pycache__
+.idea
+.tox
+.venv
diff --git a/.travis.yml b/.travis.yml
index c17e6d5..bca8a01 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ language: python
 python: 3.6
 
 install:
-- pip install wheel flake8
+- pip install wheel flake8 requests
 
 script:
 - flake8
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 69ac047..83b7e50 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -29,6 +29,32 @@ Removed
 Security
 --------
 
+`v0.3.1`_ (15, March, 2019)
+==========================
+
+Added
+-----
+
+* Qmake build test code in CI environment.(#14)
+
+Fixed
+-----
+
+* Connect to Qt download server through proxy with authentication.(#17)
+
+Changed
+-------
+
+* Change QtInstaller.install() function signature not to take any parameter.
+* Replace standard urllib to requests library.(#18)
+* Use 7zr external command instead of 7z in Linux and mac OSX envitonment.
+
+Removed
+-------
+
+* requirements.txt file.
+
+
 `v0.3.0`_ (8, March, 2019)
 ==========================
 
@@ -107,7 +133,8 @@ Fixed
 
 * Fork from https://git.kaidan.im/lnj/qli-installer
 
-.. _Unreleased: https://github.com/miurahr/qli-installer/compare/v0.3.0...HEAD
+.. _Unreleased: https://github.com/miurahr/qli-installer/compare/v0.3.1...HEAD
+.. _v0.3.1: https://github.com/miurahr/qli-installer/compare/v0.3.0...v0.3.1
 .. _v0.3.0: https://github.com/miurahr/qli-installer/compare/v0.2.0...v0.3.0
 .. _v0.2.0: https://github.com/miurahr/qli-installer/compare/v0.1.0...v0.2.0
 .. _v0.1.0: https://github.com/miurahr/qli-installer/compare/v0.0.2...v0.1.0
diff --git a/aqt/__init__.py b/aqt/__init__.py
index 41fd26d..17ee869 100644
--- a/aqt/__init__.py
+++ b/aqt/__init__.py
@@ -26,11 +26,6 @@ import sys
 from aqt.archives import QtArchives
 from aqt.installer import QtInstaller
 
-if sys.version_info.major == 3:
-    from urllib.request import ProxyHandler, build_opener, install_opener
-else:
-    from urllib2 import ProxyHandler, build_opener, install_opener
-
 
 def main():
     parser = argparse.ArgumentParser(prog='aqtinst', description='Install Qt SDK.',
@@ -61,12 +56,7 @@ def main():
         exit(1)
     qt_version = args.qt_version
 
-    # support proxy connection
-    proxies = ProxyHandler({})
-    opener = build_opener(proxies)
-    install_opener(opener)
-
-    QtInstaller(QtArchives(os_name, qt_version, target, arch)).install(qt_version, arch)
+    QtInstaller(QtArchives(os_name, qt_version, target, arch)).install()
 
     sys.stdout.write("\033[K")
     print("Finished installation")
diff --git a/aqt/archives.py b/aqt/archives.py
index 7db7d76..e1ff90f 100644
--- a/aqt/archives.py
+++ b/aqt/archives.py
@@ -20,12 +20,8 @@
 # IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-import sys
 import xml.etree.ElementTree as ElementTree
-if sys.version_info.major == 3:
-    from urllib.request import urlopen
-else:
-    from urllib2 import urlopen
+import requests
 
 
 class QtPackage:
@@ -58,6 +54,9 @@ class QtArchives:
     archives = []
 
     def __init__(self, os_name, qt_version, target, arch):
+        self.qt_version = qt_version
+        self.target = target
+        self.arch = arch
         qt_ver_num = qt_version.replace(".", "")
         if os_name == 'windows':
             archive_url = self.BASE_URL + os_name + '_x86/' + target + '/' + 'qt5_' + qt_ver_num + '/'
@@ -66,8 +65,8 @@ class QtArchives:
 
         # Get packages index
         update_xml_url = "{0}Updates.xml".format(archive_url)
-        content = urlopen(update_xml_url).read()
-        self.update_xml = ElementTree.fromstring(content)
+        r = requests.get(update_xml_url)
+        self.update_xml = ElementTree.fromstring(r.text)
         for packageupdate in self.update_xml.iter("PackageUpdate"):
             name = packageupdate.find("Name").text
             if name.split(".")[-1] != arch:
@@ -95,3 +94,6 @@ class QtArchives:
 
     def get_archives(self):
         return self.archives
+
+    def get_target_config(self):
+        return self.qt_version, self.target, self.arch
diff --git a/aqt/installer.py b/aqt/installer.py
index 0e6c0af..ce4dfb1 100644
--- a/aqt/installer.py
+++ b/aqt/installer.py
@@ -24,11 +24,10 @@ import os
 import platform
 import sys
 from multiprocessing.dummy import Pool
+import requests
 if sys.version_info.major == 3:
-    from urllib.request import urlretrieve
     from subprocess import run
 else:
-    from urllib import urlretrieve
     from subprocess import call as run
 
 
@@ -45,7 +44,10 @@ class QtInstaller:
         url = package.get_url()
         sys.stdout.write("\033[K")
         print("-Downloading {}...".format(url))
-        urlretrieve(url, archive)
+        r = requests.get(url, stream=True)
+        with open(archive, 'wb') as fd:
+            for chunk in r.iter_content(chunk_size=8196):
+                fd.write(chunk)
         sys.stdout.write("\033[K")
         print("-Extracting {}...".format(archive))
         if platform.system() == 'Windows':
@@ -58,7 +60,8 @@ class QtInstaller:
     def get_base_dir(qt_version):
         return os.path.join(os.getcwd(), 'Qt{}'.format(qt_version))
 
-    def install(self, qt_version, arch):
+    def install(self):
+        qt_version, target, arch = self.qt_archives.get_target_config()
         if arch.startswith('win'):
             arch_dir = arch[6:]
         else:
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 83578de..53f9ad7 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -12,6 +12,7 @@ jobs:
       versionSpec: '3.6'
       architecture: 'x64'
   - script: |
+      python -m pip install requests
       python -m pip install flake8 twine wheel
       flake8 .
     displayName: 'Run lint tests'
@@ -25,6 +26,9 @@ jobs:
       arguments: $(qtversion) linux desktop
       workingDirectory: $(Build.BinariesDirectory)
     displayName: install qt
+  - script: |
+      $(Build.BinariesDirectory)/Qt$(qtversion)/$(qtversion)/gcc_64/bin/qmake $(Build.SourcesDirectory)/tests
+      make
   - script: python setup.py sdist bdist_wheel
 
 - job: Ubuntu_1604_py2
@@ -38,6 +42,7 @@ jobs:
   - script: |
       sudo apt-get update
       sudo apt-get -y install p7zip
+      python -m pip install requests
   - task: PythonScript@0
     inputs:
       scriptSource: filePath
@@ -45,6 +50,9 @@ jobs:
       arguments: $(qtversion) linux desktop
       workingDirectory: $(Build.BinariesDirectory)
     displayName: install qt
+  - script: |
+      $(Build.BinariesDirectory)/Qt$(qtversion)/$(qtversion)/gcc_64/bin/qmake $(Build.SourcesDirectory)/tests
+      make
   - script: ls -lR $(Build.BinariesDirectory)
   
 - job: macOS
@@ -55,7 +63,9 @@ jobs:
     inputs:
       versionSpec: '3.6'
       architecture: 'x64'
-  - script: brew install p7zip
+  - script: |
+      brew install p7zip
+      python -m pip install requests
   - task: PythonScript@0
     inputs:
       scriptSource: filePath
@@ -63,6 +73,9 @@ jobs:
       arguments: $(qtversion) mac desktop
       workingDirectory: $(Build.BinariesDirectory)
     displayName: install qt
+  - script: |
+      $(Build.BinariesDirectory)/Qt$(qtversion)/$(qtversion)/clang_64/bin/qmake $(Build.SourcesDirectory)/tests
+      make
   - script: ls -lR $(Build.BinariesDirectory)
 
 - job: Windows
@@ -73,7 +86,9 @@ jobs:
     inputs:
       versionSpec: '3.6'
       architecture: 'x64'
-  - script: cinst -y 7zip
+  - script: |
+      cinst -y 7zip
+      python -m pip install requests
   - task: PythonScript@0
     inputs:
       scriptSource: filePath
diff --git a/setup.py b/setup.py
index 85e5583..a69344b 100644
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,7 @@ def readme():
 
 
 setup(name='aqtinstall',
-      version='0.3.0',
+      version='0.3.1',
       description='Another unofficial Qt installer',
       url='http://github.com/miurahr/aqtinstall',
       license='MIT',
@@ -20,5 +20,14 @@ setup(name='aqtinstall',
       author='Hioshi Miura',
       author_email='miurahr@linux.com',
       packages=["aqt"],
+      install_requires=['requests'],
+      extras_require={
+        'dev': [
+            'pytest',
+            'pytest-pep8',
+            'pytest-cov',
+            'flake8'
+        ]
+      },
       scripts=["aqtinst"]
       )
diff --git a/tests/hello.pro b/tests/hello.pro
new file mode 100644
index 0000000..57f727a
--- /dev/null
+++ b/tests/hello.pro
@@ -0,0 +1,9 @@
+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = Hello
+TEMPLATE = app
+
+SOURCES += main.cpp
+
diff --git a/tests/main.cpp b/tests/main.cpp
new file mode 100644
index 0000000..cd61fcb
--- /dev/null
+++ b/tests/main.cpp
@@ -0,0 +1,12 @@
+#include <QApplication>
+#include <QPushButton>
+
+int main(int argc, char **argv)
+{
+ QApplication app (argc, argv);
+
+ QPushButton button ("Hello world !");
+ button.show();
+
+ return app.exec();
+}
\ No newline at end of file