diff --git a/requirements.txt b/requirements.txt
index 7fef4a5..de1c3a4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ nose==1.3.6
 numpy==1.9.2
 nyc-geoclient==0.0.2
 path-and-address==1.0.0
-pyOpenSSL==0.15.1
+pyOpenSSL==17.5.0
 pyasn1==0.1.7
 pycparser==2.13
 pytest==2.7.2