diff --git a/requirements/requirements-dev.in b/requirements/requirements-dev.in
index 5d5282c..0160783 100644
--- a/requirements/requirements-dev.in
+++ b/requirements/requirements-dev.in
@@ -1,3 +1,4 @@
 -r requirements.in
 
+flake8
 pip-tools
diff --git a/requirements/requirements-dev.txt b/requirements/requirements-dev.txt
index 254693a..6d60937 100644
--- a/requirements/requirements-dev.txt
+++ b/requirements/requirements-dev.txt
@@ -5,6 +5,11 @@
 #    pip-compile --output-file=requirements/requirements-dev.txt requirements/requirements-dev.in
 #
 click==7.0                # via pip-tools
+entrypoints==0.3          # via flake8
+flake8==3.7.9
+mccabe==0.6.1             # via flake8
 npyscreen==4.10.5
 pip-tools==4.4.1
+pycodestyle==2.5.0        # via flake8
+pyflakes==2.1.1           # via flake8
 six==1.14.0               # via pip-tools