diff --git a/tools/test-requires b/tools/test-requires
index 30546276..da50e3e0 100644
--- a/tools/test-requires
+++ b/tools/test-requires
@@ -1,4 +1,4 @@
 coverage
 nose
-pep8==0.6.1
+pep8
 pylint==0.25.0