diff --git a/requirements_dev.txt b/requirements_dev.txt
index feba3af..5e670a6 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -8,7 +8,7 @@ pytest-cov==2.5.1
 pytest_mock==1.10.0
 holidays==0.9.10
 flake8==3.7.7
-flake8-import-order==0.18
+flake8-import-order==0.18.1
 jupyter==1.0.0
 pip==19.0.3
 wheel==0.33.1