diff --git a/module4/chalenger.ipynb b/module4/chalenger.ipynb
index b5870a63a0ea03c1c7de3ad6e54d69fef0866093..a272051fc1ef76d412fbeb4126e58ce453ca6269 100644
Binary files a/module4/chalenger.ipynb and b/module4/chalenger.ipynb differ