diff --git a/requirements-test.txt b/requirements-test.txt
index db9c0fc..a117293 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -3,6 +3,6 @@ pytest-vcr==1.0.*
 pytest-cov==3.0.*
 black==21.12b0
 isort==5.10.*
-flake8==3.8.*
+flake8==4.0.*
 mypy==0.790
 requests-mock==1.9.*
\ No newline at end of file