diff --git a/requirements.txt b/requirements.txt
index 3ed1574..0fb4f40 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ djangorestframework==3.7.7
 djangorestframework-jwt==1.11.0
 docopt==0.6.2
 dpostools==0.0.19
-ecdsa==0.13
+ecdsa==0.13.3
 ECPy==0.9.0
 future==0.16.0
 graphene==2.0.1