diff --git a/.gitattributes b/.gitattributes
index 37922ed780..5e752967ab 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -4,3 +4,4 @@
 # Don't let git change end of line characters in the data directory.
 perfkitbenchmarker/data/* -text
 tests/data/* -text
+*.png -text