diff --git a/requirements.txt b/requirements.txt
index 959979f..deac4ba 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ idna==2.0
 ndg-httpsclient==0.4.0
 pyasn1==0.1.9
 pycparser==2.14
-pyOpenSSL==0.15.1
+pyOpenSSL==17.5.0
 requests==2.8.1
 six==1.10.0
 urllib3==1.12