diff --git a/telephony/venv_requirements/requirements.txt b/telephony/venv_requirements/requirements.txt
index efd1760..c27f864 100644
--- a/telephony/venv_requirements/requirements.txt
+++ b/telephony/venv_requirements/requirements.txt
@@ -7,7 +7,7 @@ blinker==1.3
 coaster==0.4.2
 decorator==4.0.10
 docflow==0.3.1
-ecdsa==0.10
+ecdsa==0.13.3
 Fabric==1.7.0
 feedparser==5.2.1
 Flask==0.10.1