diff --git a/keyserver/docker-compose.yml b/keyserver/docker-compose.yml
--- a/keyserver/docker-compose.yml
+++ b/keyserver/docker-compose.yml
@@ -10,6 +10,7 @@
       - "3000:3000"
     environment:
       - REDIS_URL=redis://cache
+      - COMM_LISTEN_ADDR=0.0.0.0
       - COMM_MYSQL_HOST=${COMM_MYSQL_HOST:-database}
       - COMM_MYSQL_DATABASE
       - COMM_MYSQL_USER
diff --git a/keyserver/src/keyserver.js b/keyserver/src/keyserver.js
--- a/keyserver/src/keyserver.js
+++ b/keyserver/src/keyserver.js
@@ -160,6 +160,9 @@
       server.use(squadCalBaseRoutePath, squadCalRouter);
     }
 
-    server.listen(parseInt(process.env.PORT, 10) || 3000, 'localhost');
+    server.listen(
+      parseInt(process.env.PORT, 10) || 3000,
+      process.env.COMM_LISTEN_ADDR || 'localhost',
+    );
   }
 })();