diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -70,7 +70,7 @@ http://<thumbor-server>/300x200/smart/s.glbimg.com/et/bb/f/original/2011/03/24/V
 
       install_requires=[
           "tornado>=2.1.1,<2.2.0",
-          "pyCrypto>=2.4.1,<2.5.0",
+          "pyCrypto>=2.4.1",
           "pycurl>=7.19.0,<7.20.0",
           "Pillow>=1.7.5,<1.8.0",
           "derpconf>=0.2.0",
as ubuntu <I> comes with python-crypto <I>-2, Thumbor does not want starting