diff --git a/README.md b/README.md
index e3af4e51..f53c6244 100644
--- a/README.md
+++ b/README.md
@@ -12,9 +12,10 @@ Each server has different limits to configure. The `soft_limit` is the number of
 
 ## Quick development
 
-1. Run `docker-compose up -d` to start the database and caches. See `docker-compose.yml` for details.
-2. Copy `./config/example.toml` to `./config/development.toml` and change settings to match your setup.
-3. Run `cargo` commands:
+1. `brew install librdkafka` or `sudo apt-get install librdkafka-dev`
+2. Run `docker-compose up -d` to start the database and caches. See `docker-compose.yml` for details.
+3. Copy `./config/example.toml` to `./config/development.toml` and change settings to match your setup.
+4. Run `cargo` commands:
 
 ```
 $ cargo run --release -- --help
diff --git a/TODO.md b/TODO.md
index ea19e987..6b2ad470 100644
--- a/TODO.md
+++ b/TODO.md
@@ -381,6 +381,7 @@ These are not yet ordered. There might be duplicates. We might not actually need
 - [ ] all anyhow::Results need to be replaced with FrontendErrorResponse. 
     - [ ] rename FrontendErrorResponse to Web3ProxyError
     - [ ] almost all the anyhows should be Web3ProxyError::BadRequest
+    - as is, these errors are seen as 500 errors and so haproxy keeps retrying them
 - change premium concurrency limit to be against ip+rpckey
   - then sites like curve.fi don't have to worry about their user count
   - it does mean we will have a harder time capacity planning from the number of keys