diff --git a/requirements.txt b/requirements.txt
index a00c838..8068fa7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -178,9 +178,9 @@ dparse==0.5.1; python_version >= "3.5" \
 filelock==3.0.12; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" \
     --hash=sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836 \
     --hash=sha256:18d82244ee114f543149c66a6e0c14e9c4f8a1044b5cdaadd0f82159d6a6ff59
-flake8==3.9.2; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.5.0") \
-    --hash=sha256:bf8fd333346d844f616e8d47905ef3a3384edae6b4e9beb0c5101e25e3110907 \
-    --hash=sha256:07528381786f2a6237b061f6e96610a4167b226cb926e2aa2b6b1d78057c576b
+flake8==4.0.1; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.5.0") \
+    --hash=sha256:479b1304f72536a55948cb40a32dce8bb0ffe3501e26eaf292c7e60eb5e0428d \
+    --hash=sha256:806e034dda44114815e23c16ef92f95c91e4c71100ff52813adf7132a6ad870d
 flask-opentracing==1.1.0 \
     --hash=sha256:a9a39d367fbe7e9ed9c77b90ac48159c1a3e82982a5abf84d3f4d710d24580ac
 flask-sqlalchemy==2.5.1; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.4.0") \