diff --git a/misc/requirements/requirements-flake8.txt b/misc/requirements/requirements-flake8.txt
index e3da58ba4..9849504db 100644
--- a/misc/requirements/requirements-flake8.txt
+++ b/misc/requirements/requirements-flake8.txt
@@ -16,7 +16,7 @@ hacking==0.11.0
 mccabe==0.5.0
 packaging==16.7
 pbr==1.10.0
-pep8==1.7.0
+pep8==1.5.7
 pep8-naming==0.4.1
 pycodestyle==2.0.0
 pydocstyle==1.0.0
diff --git a/misc/requirements/requirements-flake8.txt-raw b/misc/requirements/requirements-flake8.txt-raw
index 86c2ec917..9604f46f9 100644
--- a/misc/requirements/requirements-flake8.txt-raw
+++ b/misc/requirements/requirements-flake8.txt-raw
@@ -15,6 +15,7 @@ pep8-naming
 pydocstyle
 pyflakes
 
+# Pinned to 1.5.7 by hacking otherwise
 pep8==1.7.0
 
 # Waiting until hacking/flake8-tuple are updated