diff --git a/requirements.txt b/requirements.txt
index d56a228..d9f8260 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ coverage==4.0.2
 Flask==0.10.1
 Flask-Script==2.0.5
 Flask-Testing==0.4.2
-funcsigs==0.4
+funcsigs==1.0.2
 httplib2==0.9.2
 itsdangerous==0.24
 Jinja2==2.8