diff --git a/contrib/requirements/requirements.txt b/contrib/requirements/requirements.txt
index dee1cc7b4..6c81a5cb0 100644
--- a/contrib/requirements/requirements.txt
+++ b/contrib/requirements/requirements.txt
@@ -1,5 +1,5 @@
 pyaes>=0.1a1
-ecdsa>=0.13
+ecdsa>=0.13.3
 qrcode
 protobuf
 dnspython