diff --git a/CHANGELOG.md b/CHANGELOG.md
index 23a2086..51e1b5c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## Unreleased
 - Applied v2.2.28 changes @alangecker
+- Updated `development.md` docs (example config & note about issue #66) @alangecker
 
 ## Release v2.2.27-2 (2020-10-16)
 - Increase proxy timeout to avoid aborting websocket connections @alangecker
diff --git a/docs/development.md b/docs/development.md
index 4a72642..7d1624f 100644
--- a/docs/development.md
+++ b/docs/development.md
@@ -10,9 +10,11 @@ ENABLE_HTTPS_PROXY=true
 #ENABLE_COTURN=true
 #ENABLE_GREENLIGHT=true
 #ENABLE_WEBHOOKS=true
+#ENABLE_PROMETHEUS_EXPORTER=true
+#ENABLE_RECORDING=true
 
 DOMAIN=10.7.7.1
-EXTERNAL_IP=10.7.7.1
+EXTERNAL_IPv4=10.7.7.1
 STUN_IP=216.93.246.18
 STUN_PORT=3478
 TURN_SERVER=turns:localhost:465?transport=tcp
@@ -37,6 +39,9 @@ RAILS_SECRET=SuperRailsSecret
   https://mconf.github.io/api-mate/#server=https://10.7.7.1/bigbluebutton/api&sharedSecret=SuperSecret
     * At some point your browser will warn you about an invalid certificate, but you can press _"Accept the Risk and Continue" / "Proceed to 10.7.7.1 (unsafe)"_
 
+## Notes
+- Joining a room via Greenlight currently leads to a "401 session not found" error (see https://github.com/alangecker/bigbluebutton-docker/issues/66). Use the API Mate instead
+
 ## Changes
 - After doing some changes you usually must...
   * rebuild the image(s): \