diff --git a/requirements.txt b/requirements.txt
index e05722c..f39789e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-numexpr==2.6.5
+numexpr==2.8.5
 numpy==1.14.5
 pandas==0.23.2
 python-dateutil==2.7.3