diff --git a/requirements.txt b/requirements.txt
index 59fb956..1dba9de 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,7 @@
 absl-py==0.7.1
 astor==0.7.1
 attrs==19.1.0
+autopep8==1.4.4
 backcall==0.1.0
 backports.weakref==1.0rc1
 bleach==1.5.0
@@ -46,6 +47,7 @@ prometheus-client==0.6.0
 prompt-toolkit==2.0.9
 protobuf==3.7.0
 ptyprocess==0.6.0
+pycodestyle==2.5.0
 Pygments==2.3.1
 pyparsing==2.3.1
 pyrsistent==0.14.11