diff --git a/requirements.txt b/requirements.txt
index 72f6c37..88fbcab 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ defer==1.0.6
 dirspec==13.10
 Django==1.8.7
 duplicity==0.7.6
-ecdsa==0.13
+ecdsa==0.13.3
 enum34==1.1.2
 feedparser==5.1.3
 gyp==0.1