diff --git a/blacklist.txt b/blacklist.txt
index 40da82038c..63f729af41 100644
--- a/blacklist.txt
+++ b/blacklist.txt
@@ -1,6 +1,8 @@
 flake8
+flake8_docstrings
 hacking
 mccabe
+pep257
 pep8
 pyflakes
 pylint
diff --git a/global-requirements.txt b/global-requirements.txt
index 723adc6585..8bd973bf12 100644
--- a/global-requirements.txt
+++ b/global-requirements.txt
@@ -326,8 +326,10 @@ zake>=0.1.6 # Apache-2.0
 # next hacking release). Only these versions will be selected, because hacking
 # specifies the concrete version to choose.
 flake8>=2.2.4,<=2.4.1
+flake8_docstrings==0.2.1.post1
 hacking>=0.10.2,<0.11
 mccabe==0.2.1 # MIT License
+pep257==0.7.0 # MIT License
 pep8==1.5.7
 pyflakes==0.8.1
 pylint==1.4.4  # GNU GPL v2