diff --git a/requirements_test.txt b/requirements_test.txt
index 2f3fb31..4a62f30 100644
--- a/requirements_test.txt
+++ b/requirements_test.txt
@@ -1,6 +1,6 @@
 pylint==2.8.3
 black==21.6b0
 flake8==3.9.2
-isort==5.9.0
+isort==5.9.1
 mypy==0.902
 types-protobuf==0.1.13