diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..61a0a06
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+* linguist-vendored
+*.cc linguist-vendored=false
diff --git a/vendor.yml b/vendor.yml
index ef4e63c..82ab3cb 100644
--- a/vendor.yml
+++ b/vendor.yml
@@ -1,4 +1,4 @@
 js/* linguist-vendored
 *.py linguist-vendored
 *.css linguist-vendored
-charts-template.html linguist-vendored
+*.html linguist-vendored