1 files changed, 2 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index dc19a870..25c8f606 100644
--- a/setup.py
+++ b/setup.py
@@ -67,7 +67,8 @@ setup(
         "pyOpenSSL>=0.15.1",
         "cryptography>=0.9",
         "passlib>=1.6.2",
-        "hpack>=1.0.1"],
+        "hpack>=1.0.1",
+        "certifi"],
     setup_requires=[
         "cffi",
         "pyOpenSSL>=0.15.1",