diff --git a/src/requirements.txt b/src/requirements.txt
index eee6132..f3cf8a9 100644
--- a/src/requirements.txt
+++ b/src/requirements.txt
@@ -10,3 +10,4 @@ pytest-mock>=1.7.1,<2.0
 pytest>=3.4, <4.0
 wheel==0.32.2
 flake8
+isort