diff --git a/setup.py b/setup.py
index bd666e93c..4dc6d18c1 100644
--- a/setup.py
+++ b/setup.py
@@ -65,7 +65,8 @@ setup(
     ],
     python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
     install_requires=[
-        'Twisted>=13.1.0',
+        'Twisted>=13.1.0;python_version!="3.4"',
+        'Twisted>=13.1.0,<=19.2.0;python_version=="3.4"',
         'w3lib>=1.17.0',
         'queuelib',
         'lxml',