diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs
index f572ad9cd02..e9e4b55402c 100644
--- a/src/tools/tidy/src/deps.rs
+++ b/src/tools/tidy/src/deps.rs
@@ -33,6 +33,12 @@ static EXCEPTIONS: &'static [&'static str] = &[
     "openssl", // BSD+advertising clause, cargo, mdbook
     "pest", // MPL2, mdbook via handlebars
     "thread-id", // Apache-2.0, mdbook
+    "cssparser", // MPL-2.0, rustdoc
+    "smallvec", // MPL-2.0, rustdoc
+    "magenta-sys", // BSD-3-Clause, rustdoc
+    "magenta", // BSD-3-Clause, rustdoc
+    "cssparser-macros", // MPL-2.0, rustdoc
+    "selectors", // MPL-2.0, rustdoc
 ];
 
 pub fn check(path: &Path, bad: &mut bool) {