diff --git a/tox.ini b/tox.ini
index 8f1c76f8d..05ca50183 100644
--- a/tox.ini
+++ b/tox.ini
@@ -29,7 +29,7 @@ deps =
     coverage==4.0.1
     pytest-cov==2.2.0
     beautifulsoup4==4.4.1
-    httpbin==0.3.0
+    httpbin==0.4.0
     itsdangerous==0.24
     Werkzeug==0.10.4
     vulture==0.8.1