diff --git a/requirements.txt b/requirements.txt
index dd2402b..a91c8fd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,6 @@ bitarray==0.8.1
 funcy==1.7.2
 lenses==0.1.7
 nose2==0.6.5
-numpy==1.11.3
 pandas==0.19.2
 parsimonious==0.7.0
 sympy==1.0
diff --git a/stl/boolean_eval.py b/stl/boolean_eval.py
index 5e3e30c..9fdf6ec 100644
--- a/stl/boolean_eval.py
+++ b/stl/boolean_eval.py
@@ -4,7 +4,6 @@
 from functools import singledispatch
 import operator as op
 
-import numpy as np
 import funcy as fn
 from lenses import lens