diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 92edbc7..6b230f8 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -8,10 +8,13 @@ Great to see that you want to help out! Here are some tips for getting started:
 
 * Most contributions should include tests – see the [existing test code] for how to write these.
 
-* Documentation for Rust compiler APIs can be found on [Manishearth's site].
+* Documentation on the proc macro interface can be found on [docs.rust-lang.org][proc_macro].
+    - As for lints: [Manishearth's site] may be of some help, though (as of this writing) it hasn't been updated since April.
 
 Have fun! ☺️
 
 [easy issues]: https://github.com/lfairy/maud/issues?q=is%3Aissue+is%3Aopen+label%3A%22difficulty%3A+easy%22
-[existing test code]: https://github.com/lfairy/maud/tree/master/maud_macros/tests
-[Manishearth's site]: https://manishearth.github.io/rust-internals-docs/syntax/index.html
+[existing test code]: https://github.com/lfairy/maud/tree/master/maud/tests
+[proc_macro]: https://doc.rust-lang.org/nightly/proc_macro/
+[compiler source]: https://github.com/rust-lang/rust/tree/master/src
+[Manishearth's site]: https://manishearth.github.io/rust-internals-docs/rustc/