diff --git a/requirements.txt b/requirements.txt
index 7d6bdb7..57ebee8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ Flask-Restless==1.0.0b1
 Flask-SQLAlchemy==2.2
 ipdb==0.10.2
 ipython==5.3.0
-isort==4.2.5
+isort==4.2.15
 lxml==3.7.3
 marshmallow==2.13.4
 pgcli==1.5.1