diff --git a/requirements.txt b/requirements.txt
index aec3f00..260e621 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 nose==1.3.0
 rednose==0.4.1
-ecdsa==0.13.3
+ecdsa==0.19.2