diff --git a/INSTALL.md b/INSTALL.md
index 668c9c13c..044aedf7c 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -97,7 +97,17 @@ Create config file, based on `dendrite-config.yaml`. Call it `dendrite.yaml`. Th
 
 ## Starting a monolith server
 
-TODO
+It is possible to use 'naffka' as an in-process replacement to Kafka when using
+the monolith server. To do this, set `use_naffka: true` in `dendrite.yaml`.
+
+The monolith server can be started as shown below. By default it listens for
+HTTP connections on port 8008, so point your client at
+`http://localhost:8008`. If you set `--tls-cert` and `--tls-key` as shown
+below, it will also listen for HTTPS connections on port 8448.
+
+```bash
+./bin/dendrite-monolith-server --tls-cert=server.crt --tls-key=server.key
+```
 
 ## Starting a multiprocess server