diff --git a/.gitattributes b/.gitattributes
index a5d04a3a48..a533bb4c5e 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -17,4 +17,5 @@
 # under the License.
 #
 * text eol=lf
+*.png binary
 core.autocrlf=false