diff --git a/requirements_for_test.txt b/requirements_for_test.txt
index a6f723957..9698f1d59 100644
--- a/requirements_for_test.txt
+++ b/requirements_for_test.txt
@@ -1,5 +1,5 @@
 -r requirements.txt
-isort==4.3.4
+isort==4.3.16
 pytest==3.10.1
 pytest-env==0.6.2
 pytest-mock==1.10.1