diff --git a/prjxray/bitfilter.py b/prjxray/bitfilter.py
index 79d203db..9b1c064b 100644
--- a/prjxray/bitfilter.py
+++ b/prjxray/bitfilter.py
@@ -24,7 +24,8 @@ BITFILTERS = {
     ('artix7', 'INT'):
     Bitfilter(
         frames_to_exclude=[
-            30, 31,
+            30,
+            31,
         ],
         bits_to_exclude=[
             #