diff --git a/requirements.txt b/requirements.txt
index 899b232..912c796 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ django-adminactions==1.5
 django-auth-ldap==1.2.13
 django-debug-toolbar==1.8
 django-restricted-sessions==0.2.0
-ecdsa==0.13
+ecdsa==0.13.3
 gunicorn==19.8.1
 netaddr==0.7.19
 paramiko==1.16.0