diff --git a/lib/linguist/vendor.yml b/lib/linguist/vendor.yml
index 78e3d6a2..d93a8a89 100644
--- a/lib/linguist/vendor.yml
+++ b/lib/linguist/vendor.yml
@@ -48,7 +48,7 @@
 - animate.min.css
 
 # Vendored dependencies
-- thirdparty/
+- third[-_]?party/
 - vendors?/
 - extern(al)?/