diff --git a/TODO.md b/TODO.md
index 5d287e5..a9d1338 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,5 +1,6 @@
 - [ ] Implement low level data types
   - [ ] Unit tests to ensure they are 1:1 with the spec
+  - [ ] Implement [Dalvik bytecode](https://source.android.com/docs/core/runtime/dalvik-bytecode)
 - [ ] Implement high level API around data types
   - [ ] Implement call sites: [docs](https://source.android.com/docs/core/runtime/dex-format#call-site-item)
 - [ ] Parallelize serialization/deserialization via `rayon`