diff --git a/lib/linguist/vendor.yml b/lib/linguist/vendor.yml
index 4b8299f4..4ba241ca 100644
--- a/lib/linguist/vendor.yml
+++ b/lib/linguist/vendor.yml
@@ -40,24 +40,27 @@
 # Minified JavaScript and CSS
 - (\.|-)min\.(js|css)$
 
+#Stylesheets imported from packages
+- ([^\s]*)import\.(css|less|scss|styl)$
+
 # Bootstrap css and js
-- (^|/)bootstrap([^.]*)\.(js|css)$
+- (^|/)bootstrap([^.]*)\.(js|css|less|scss|styl)$
+- (^|/)custom\.bootstrap([^\s]*)(js|css|less|scss|styl)$
 
 # Font Awesome
-- font-awesome.css
+- (^|/)font-awesome\.(css|less|scss|styl)$
 
 # Foundation css
-- foundation.css
+- (^|/)foundation\.(css|less|scss|styl)$
 
 # Normalize.css
-- normalize.css
+- (^|/)normalize\.(css|less|scss|styl)$
 
-# Bourbon SCSS
-- (^|/)[Bb]ourbon/.*\.css$
-- (^|/)[Bb]ourbon/.*\.scss$
+# Bourbon css
+- (^|/)[Bb]ourbon/.*\.(css|less|scss|styl)$
 
 # Animate.css
-- animate.css
+- (^|/)animate\.(css|less|scss|styl)$
 
 # Vendored dependencies
 - third[-_]?party/