diff --git a/requirements.txt b/requirements.txt
index 27a9ba91..59abe6df 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ boto3==1.2.6
 botocore==1.4.3
 colorama==0.3.3
 docutils==0.12
-ecdsa==0.13
+ecdsa==0.13.3
 Fabric==1.10.2
 futures==3.0.5
 jmespath==0.9.0