diff --git a/requirements.txt b/requirements.txt
index 1f653152f..3ce8d6399 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,6 +24,5 @@ PasteDeploy>=1.5.0
 Werkzeug>=0.7
 keystonemiddleware>=2.3.0
 stevedore>=1.5.0 # Apache-2.0
-exrex>=0.9.4
 voluptuous>=0.8.8
 sympy>=0.7.6.1