diff --git a/app/requirements.txt b/app/requirements.txt
index 1f67f9f..f8d707a 100644
--- a/app/requirements.txt
+++ b/app/requirements.txt
@@ -21,7 +21,7 @@ django-easy-pjax==1.3.0
 django-getenv==1.3.1
 django-tastypie==0.13.3
 django-tastypie-crust==0.2
-ecdsa==0.13
+ecdsa==0.13.3
 future==0.15.2
 html5lib==0.999
 httpsig==1.1.2