diff --git a/requirements-dev.txt b/requirements-dev.txt
index a849138..10ad446 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -6,9 +6,9 @@ click==7.1.2 \
 entrypoints==0.3 \
     --hash=sha256:589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19 \
     --hash=sha256:c70dd71abe5a8c85e55e12c19bd91ccfeec11a6e99044204511f9ed547d48451
-flake8==3.7.9 \
-    --hash=sha256:49356e766643ad15072a789a20915d3c91dc89fd313ccd71802303fd67e4deca \
-    --hash=sha256:45681a117ecc81e870cbf1262835ae4af5e7a8b08e40b944a8a6e6b895914cfb
+flake8==4.0.1 \
+    --hash=sha256:479b1304f72536a55948cb40a32dce8bb0ffe3501e26eaf292c7e60eb5e0428d \
+    --hash=sha256:806e034dda44114815e23c16ef92f95c91e4c71100ff52813adf7132a6ad870d
 incremental==17.5.0 \
     --hash=sha256:717e12246dddf231a349175f48d74d93e2897244939173b01974ab6661406b9f \
     --hash=sha256:7b751696aaf36eebfab537e458929e194460051ccad279c72b755a167eebd4b3