diff --git a/docs/server/source/server-reference/configuration.md b/docs/server/source/server-reference/configuration.md
index 6f3c8878..053ed68b 100644
--- a/docs/server/source/server-reference/configuration.md
+++ b/docs/server/source/server-reference/configuration.md
@@ -22,6 +22,8 @@ For convenience, here's a list of all the relevant environment variables (docume
`BIGCHAINDB_SERVER_LOGLEVEL`
`BIGCHAINDB_SERVER_WORKERS`
`BIGCHAINDB_SERVER_THREADS`
+`BIGCHAINDB_WSSERVER_HOST`
+`BIGCHAINDB_WSSERVER_PORT`
`BIGCHAINDB_CONFIG_PATH`
`BIGCHAINDB_BACKLOG_REASSIGN_DELAY`
`BIGCHAINDB_LOG`
@@ -180,6 +182,40 @@ export BIGCHAINDB_SERVER_THREADS=5
}
```
+
+## wsserver.host and wsserver.port
+
+These settings are for the
+[aiohttp server](https://aiohttp.readthedocs.io/en/stable/index.html),
+which is used to serve the
+[WebSocket Event Stream API](../websocket-event-stream-api.html).
+`wsserver.host` is where to bind the aiohttp server socket and
+`wsserver.port` is the corresponding port.
+If you want to allow connections from anyone, on port 9985,
+set `wsserver.host` to 0.0.0.0 and `wsserver.port` to 9985.
+
+**Example using environment variables**
+```text
+export BIGCHAINDB_WSSERVER_HOST=0.0.0.0
+export BIGCHAINDB_WSSERVER_PORT=9985
+```
+
+**Example config file snippet**
+```js
+"wsserver": {
+ "host": "0.0.0.0",
+ "port": 65000
+}
+```
+
+**Default values (from a config file)**
+```js
+"wsserver": {
+ "host": "localhost",
+ "port": 9985
+}
+```
+
## backlog_reassign_delay
Specifies how long, in seconds, transactions can remain in the backlog before being reassigned. Long-waiting transactions must be reassigned because the assigned node may no longer be responsive. The default duration is 120 seconds.