diff --git a/requirements.txt b/requirements.txt
index 4f981d0e7..eedbfad06 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,8 +5,6 @@ binaryornot==0.4.4
 # Code quality
 # ------------------------------------------------------------------------------
 flake8==3.5.0
-pycodestyle==2.3.1
-pyflakes==1.6.0
 
 # Testing
 # ------------------------------------------------------------------------------