diff --git a/setup.py b/setup.py
index a036a5f8..19ccf738 100755
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@
     install_requires=[
         'lxml >= 3.5.0, < 3.7',
         'defusedxml >= 0.4.1, < 0.6',
-        'eight >= 0.3.0, < 0.4',
+        'eight >= 0.3.0, < 0.5',
         'cryptography >= 1.2.3, < 1.8',
         'pyOpenSSL >= 0.15.1, < 17',
         'certifi >= 2015.11.20.1'