diff --git a/setup.py b/setup.py
index 38df780..7cbec4e 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
     platforms='any',
     license='Creative Commons Attribution-Noncommercial-Share Alike license',
     install_requires=[
-        'ecdsa==0.13',
+        'ecdsa==0.18.0',
         'ethereum==2.1.0',
     ],
 )