diff --git a/.gitattributes b/.gitattributes
index 9c59e8e..679dcff 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,6 +1,10 @@
 # crlf line endings for text files
 * text eol=crlf
 
+# Denote all files that are truly binary and should not be modified.
+*.png binary
+*.jpg binary
+
 # Custom for Visual Studio
 *.cs     diff=csharp