diff --git a/setup.cfg b/setup.cfg
index a21d774..ca56a4c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -61,6 +61,9 @@ addopts =
   wafo/wave_theory/tests
 # wafo/stats/tests
 
+[pep8]
+max-line-length = 100
+
 [pytest]
 doctest_optionflags = NORMALIZE_WHITESPACE ELLIPSIS
 # Options for py.test: