diff --git a/lib/linguist/vendor.yml b/lib/linguist/vendor.yml
index 3609b466..8077344e 100644
--- a/lib/linguist/vendor.yml
+++ b/lib/linguist/vendor.yml
@@ -98,6 +98,9 @@
 # AngularJS
 - (^|/)angular([^.]*)(\.min)?\.js$
 
+# D3.js
+- (^|/)d3([^.]*)(\.min)?\.js$
+
 ## Python ##
 
 # django
diff --git a/test/test_blob.rb b/test/test_blob.rb
index 9f56265b..8399a747 100644
--- a/test/test_blob.rb
+++ b/test/test_blob.rb
@@ -303,6 +303,10 @@ class TestBlob < Test::Unit::TestCase
     assert blob("public/javascripts/angular.js").vendored?
     assert blob("public/javascripts/angular.min.js").vendored?
 
+    # D3.js
+    assert blob("public/javascripts/d3.v3.js").vendored?
+    assert blob("public/javascripts/d3.v3.min.js").vendored?
+
     # Fabric
     assert blob("fabfile.py").vendored?