Update setup.py

setup.py

@@ -16,7 +16,7 @@
 
 # pyOpenSSL support is flaky on some systems (I'm looking at you Apple)
 if "SAGAN_WITHOUT_SSL" not in os.environ:
-    install_requires.append("pyOpenSSL>=0.12,<0.14")
+    install_requires.append("pyOpenSSL")
 
 # Allow setup.py to be run from any path
 os.chdir(os.path.normpath(os.path.join(os.path.abspath(__file__), os.pardir)))