diff --git a/requirements-dev.txt b/requirements-dev.txt
index cd964f8..0412c5e 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,5 +2,5 @@ ipdb==0.10.1
 coverage==4.2
 pytest==3.0.2
 pytest-cov==2.3.1
-pep8
+pep8==1.7.0
 pyflakes==1.3.0