diff --git a/.gitattributes b/.gitattributes
index dfe0770..eaba6eb 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,2 +1,5 @@
 # Auto detect text files and perform LF normalization
 * text=auto
+*.[Rr]md linguist-detectable
+vignettes/* linguist-vendored=false
+*.css linguist-vendored