diff --git a/requirements_dev.txt b/requirements_dev.txt
index e7f422e..2b7c595 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,4 +5,4 @@ flake8==3.4.1
 tox==2.9.1
 coverage==4.4.1
 Sphinx==1.6.4
-isort==4.2.15
\ No newline at end of file
+isort==4.3.4
\ No newline at end of file