diff --git a/lib/linguist/vendor.yml b/lib/linguist/vendor.yml
index 3fb5ffa8..3b667371 100644
--- a/lib/linguist/vendor.yml
+++ b/lib/linguist/vendor.yml
@@ -43,6 +43,7 @@
 # Bootstrap css and js
 - (^|/)bootstrap([^.]*)\.(js|css)$
 - (^|/)custom\.bootstrap([^\s]*)(js|css|less|scss|styl)$
+- (^|/)bootstrap/([^\s]*)import\.(css|less|scss|styl)$
 
 # Font Awesome
 - font-awesome.css