diff --git a/README.md b/README.md
index b6f1100..9f50ad1 100644
--- a/README.md
+++ b/README.md
@@ -65,6 +65,14 @@ The configuration file values you will most likely want to adjust are
 `address` under the `network` section (listening address). This goes for all
 three protocols.
 
+Access control by info hash is supported for all protocols:
+
+```toml
+[access_list]
+mode = 'off' # Change to 'black' (blacklist) or 'white' (whitelist)
+path = '' # Path to text file with newline-delimited hex-encoded info hashes
+```
+
 Some documentation of the various options might be available under
 `src/lib/config.rs` in crates `aquatic_udp`, `aquatic_http`, `aquatic_ws`.