diff --git a/docker-compose.yml b/docker-compose.yml
index 50b6c58..29040ab 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -14,6 +14,7 @@ services:
             - XMPP_DOMAIN
             - XMPP_AUTH_DOMAIN
             - XMPP_BOSH_URL_BASE
+            - XMPP_MUC_DOMAIN
             - TZ
         networks:
             meet.jitsi:
@@ -30,6 +31,7 @@ services:
         environment:
             - XMPP_DOMAIN
             - XMPP_AUTH_DOMAIN
+            - XMPP_MUC_DOMAIN
             - JICOFO_COMPONENT_SECRET
             - JVB_COMPONENT_SECRET
             - JICOFO_AUTH_USER
diff --git a/env.example b/env.example
index f21aa99..9d85b3d 100644
--- a/env.example
+++ b/env.example
@@ -14,6 +14,9 @@ XMPP_AUTH_DOMAIN=auth.meet.jitsi
 # XMPP BOSH URL base. You generally don't need to change this.
 XMPP_BOSH_URL_BASE=http://xmpp.meet.jitsi:5280
 
+# XMPP domain for the MUC. You generally don't need to change this.
+XMPP_MUC_DOMAIN=muc.meet.jitsi
+
 # XMPP component password for Jitsi Videobridge.
 JVB_COMPONENT_SECRET=s3cr3t
 
diff --git a/prosody/rootfs/defaults/conf.d/jitsi-meet.cfg.lua b/prosody/rootfs/defaults/conf.d/jitsi-meet.cfg.lua
index 8604cd0..23c5e3b 100644
--- a/prosody/rootfs/defaults/conf.d/jitsi-meet.cfg.lua
+++ b/prosody/rootfs/defaults/conf.d/jitsi-meet.cfg.lua
@@ -21,7 +21,7 @@ VirtualHost "${XMPP_AUTH_DOMAIN}"
     }
     authentication = "internal_plain"
 
-Component "conference.${XMPP_DOMAIN}" "muc"
+Component "${XMPP_MUC_DOMAIN}" "muc"
     storage = "null"
 
 Component "jitsi-videobridge.${XMPP_DOMAIN}"
diff --git a/prosody/rootfs/etc/cont-init.d/10-config b/prosody/rootfs/etc/cont-init.d/10-config
index 07e5524..bc1d700 100644
--- a/prosody/rootfs/etc/cont-init.d/10-config
+++ b/prosody/rootfs/etc/cont-init.d/10-config
@@ -12,6 +12,7 @@ if [[ ! -f $PROSODY_CFG ]]; then
     sed -i \
         -e "s,\${XMPP_DOMAIN},$XMPP_DOMAIN,g" \
         -e "s,\${XMPP_AUTH_DOMAIN},$XMPP_AUTH_DOMAIN,g" \
+        -e "s,\${XMPP_MUC_DOMAIN},$XMPP_MUC_DOMAIN,g" \
         -e "s,\${JICOFO_AUTH_USER},$JICOFO_AUTH_USER,g" \
         -e "s,\${JICOFO_COMPONENT_SECRET},$JICOFO_COMPONENT_SECRET,g" \
         -e "s,\${JVB_COMPONENT_SECRET},$JVB_COMPONENT_SECRET,g" \
diff --git a/web/rootfs/etc/cont-init.d/10-config b/web/rootfs/etc/cont-init.d/10-config
index 744e7dd..7112c75 100644
--- a/web/rootfs/etc/cont-init.d/10-config
+++ b/web/rootfs/etc/cont-init.d/10-config
@@ -25,6 +25,7 @@ if [[ ! -f /config/config.js ]]; then
     sed -i \
         -e "s#jitsi-meet.example.com#$XMPP_DOMAIN#g" \
         -e "s#bosh:.*#bosh: '/http-bind',#" \
+        -e "s#muc:.*#muc: '${XMPP_MUC_DOMAIN}',#" \
         -e "s#// focusUserJid:.*#focusUserJid: '${JICOFO_AUTH_USER}@${XMPP_AUTH_DOMAIN}',#" \
         /config/config.js
 fi