diff --git a/lib/linguist/vendor.yml b/lib/linguist/vendor.yml
index b9e56a1a..c5fc987e 100644
--- a/lib/linguist/vendor.yml
+++ b/lib/linguist/vendor.yml
@@ -12,6 +12,9 @@
 # Caches
 - cache/
 
+# Dependencies
+- ^[Dd]ependencies/
+
 # C deps
 #  https://github.com/joyent/node
 - ^deps/
diff --git a/test/test_blob.rb b/test/test_blob.rb
index 9f98f217..068728d2 100644
--- a/test/test_blob.rb
+++ b/test/test_blob.rb
@@ -210,6 +210,9 @@ class TestBlob < Test::Unit::TestCase
     assert !blob("Text/README").vendored?
     assert !blob("ext/extconf.rb").vendored?
 
+    # Dependencies
+    assert blob("dependencies/windows/headers/GL/glext.h").vendored?
+
     # Node dependencies
     assert blob("node_modules/coffee-script/lib/coffee-script.js").vendored?