diff --git a/requirements.txt b/requirements.txt
index ac1ad59..8577f23 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 astroid==2.2.5
 Click==7.0
-ecdsa==0.13.2
+ecdsa==0.13.3
 Flask==1.0.2
 future==0.17.1
 isort==4.3.18