diff --git a/requirements.txt b/requirements.txt
index a7eeaa6..242bdcb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ packaging==16.8
 pyasn1-modules==0.1.1
 pyasn1==0.3.3
 pycparser==2.18; platform_python_implementation != 'PyPy'
-pyopenssl==17.2.0
+pyopenssl==17.3.0
 pyparsing==2.2.0
 service-identity==17.0.0
 six==1.10.0