diff --git a/requirements.txt b/requirements.txt
index 42cf99d..14af4d4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ pytest-randomly==1.1.2
 
 mock==2.0.0
 mypy==0.501  ; python_version >= "3.3"
+astroid>=1.6,<=2.0.4
diff --git a/setup.py b/setup.py
index f05e523..c293a54 100755
--- a/setup.py
+++ b/setup.py
@@ -38,7 +38,7 @@ def get_version():
     test_suite='tests',
     install_requires=[
         'GitPython~=2.1.11',
-        'typing~=3.6.6',
+        'typing~=3.6.6 ; python_version<"3.5"',
         'autopep8~=1.4',
     ],
     extras_require={