diff --git a/requirements.txt b/requirements.txt
index 2a36d1e..7b94429 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ configparser==3.5.0
 crontab==0.22.2
 Django==1.11.10
 docutils==0.11
-ecdsa==0.11
+ecdsa==0.13.3
 enum34==1.1.6
 futures==3.0.3
 gyp==0.1