diff --git a/setup.py b/setup.py
index 7518f3c..e16db75 100644
--- a/setup.py
+++ b/setup.py
@@ -44,7 +44,7 @@
         "service_identity>=18.1.0",
         "requests>=2.18.4",
         "six>=1.11.0",
-        "pyOpenSSL>=17.5.0",
+        "pyOpenSSL>=19.0.0",
         "python-dateutil>=2.6.1",
         "autobahn[twisted]==19.11.2"
     ],