diff --git a/requirements-development.txt b/requirements-development.txt
index add42b4c..58748689 100644
--- a/requirements-development.txt
+++ b/requirements-development.txt
@@ -6,7 +6,7 @@ factory-boy==2.11.1
 Faker==1.0.5
 flake8==3.7.7
 flake8-isort==2.7.0
-isort==4.3.17
+isort==4.3.18
 mock==2.0.0
 pytest==4.4.1
 pytest-cov==2.6.1