diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -43,7 +43,7 @@ requirements = [
     "alembic >= 0.8.0, < 1.1",
     "gearbox >= 0.1.0, < 1",
     "waitress >= 0.8.8, < 1.4",
-    "WebOb >= 1.7, < 1.9",
+    "WebOb >= 1.8, < 1.9",
     "backlash >= 0.1.2, < 1",
     "TurboGears2 >= 2.3.10, < 2.5",
     "tgext.routes >= 0.2.0, < 1",