diff --git a/tox.ini b/tox.ini
index abbae820a..3b005f31f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,7 +20,7 @@ deps =
     Flask==0.10.1
     glob2==0.4.1
     httpbin==0.4.1
-    hypothesis==3.2.0
+    hypothesis==3.4.0
     itsdangerous==0.24
     Mako==1.0.4
     parse==1.6.6