diff --git a/requirements-development.txt b/requirements-development.txt
index c63ececb..1918a49b 100644
--- a/requirements-development.txt
+++ b/requirements-development.txt
@@ -6,7 +6,7 @@ factory-boy==2.11.1
 Faker==1.0.7
 flake8==3.7.7
 flake8-isort==2.7.0
-isort==4.3.19
+isort==4.3.20
 mock==3.0.5
 pytest==4.5.0
 pytest-cov==2.7.1