diff --git a/.gitattributes b/.gitattributes
index 85bc6fdb8..bc3a9abf9 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -10,6 +10,7 @@
 *.png binary
 *.jpg binary
 *.dxf binary
+*.mpy binary
 
 # These should also not be modified by git.
 tests/basics/string_cr_conversion.py -text