diff --git a/cereal b/cereal
index b0c746b1e1..6511990644 160000
--- a/cereal
+++ b/cereal
@@ -1 +1 @@
-Subproject commit b0c746b1e1e3ca04f61484fd073123a1bf96afd1
+Subproject commit 6511990644c5a133518b88d0cdaec089d216f607
diff --git a/selfdrive/car/chrysler/chryslercan.py b/selfdrive/car/chrysler/chryslercan.py
index c06c27e964..7e6e320cb4 100644
--- a/selfdrive/car/chrysler/chryslercan.py
+++ b/selfdrive/car/chrysler/chryslercan.py
@@ -13,7 +13,7 @@ def calc_checksum(data):
   checksum = 0xFF
   for curr in data[:-1]:
     shift = 0x80
-    for i in range(0, 8):
+    for _ in range(0, 8):
       bit_sum = curr & shift
       temp_chk = checksum & 0x80
       if (bit_sum != 0):