diff --git a/src/GitHub.Api/Resources/.gitattributes b/src/GitHub.Api/Resources/.gitattributes
index bc6b99a79..da4c9970c 100644
--- a/src/GitHub.Api/Resources/.gitattributes
+++ b/src/GitHub.Api/Resources/.gitattributes
@@ -5,6 +5,7 @@
 *.unity -text merge=unityyamlmerge diff
 *.asset -text merge=unityyamlmerge diff
 *.prefab -text merge=unityyamlmerge diff
+*.mat -text merge=unityyamlmerge diff
 
 # Image formats
 *.psd filter=lfs diff=lfs merge=lfs -text