diff --git a/.gitattributes b/.gitattributes
index 3412c03..b571d14 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1 +1,4 @@
-*. linguist-language=Javascript
+*.Roff linguist-detectable=false
+
+* linguist-vendored
+*.js linguist-vendored=true