diff --git a/requirements.txt b/requirements.txt
index 5d6de42..6efcab0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 appdirs==1.4.0
 configparser==3.5.0b1
 docutils==0.12
-ecdsa==0.11
+ecdsa==0.13.3
 Jinja2==2.7.3
 MarkupSafe==0.23
 paramiko==1.14.1
diff --git a/setup.py b/setup.py
index eff1ecb..067db1b 100644
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@ def run_tests(self):
         'appdirs==1.4.0',
         'configparser==3.5.0b1',
         'docutils==0.12',
-        'ecdsa==0.11',
+        'ecdsa==0.13.3',
         'Jinja2==2.7.3',
         'MarkupSafe==0.23',
         'paramiko==1.14.1',