diff --git a/lbry/setup.py b/lbry/setup.py
index 35e6e6b76..baa31cddf 100644
--- a/lbry/setup.py
+++ b/lbry/setup.py
@@ -35,7 +35,7 @@ setup(
         'cryptography==2.5',
         'protobuf==3.6.1',
         'msgpack==0.6.1',
-        'ecdsa==0.13',
+        'ecdsa==0.13.3',
         'pyyaml==4.2b1',
         'docopt==0.6.2',
         'hachoir',