diff --git a/lib/Server.js b/lib/Server.js
index 6c265154a9..6fb8f87396 100644
--- a/lib/Server.js
+++ b/lib/Server.js
@@ -170,13 +170,13 @@ class Server {
   }
 
   // eslint-disable-next-line class-methods-use-this
-  normalizeOptions() {
+  async normalizeOptions() {
     const { options } = this;
 
     if (!this.logger) {
       this.logger = this.compiler.getInfrastructureLogger("webpack-dev-server");
     }
-    
+
     const compilerOptions = this.getCompilerOptions();
     // TODO remove `{}` after drop webpack v4 support
     const watchOptions = compilerOptions.watchOptions || {};
@@ -528,7 +528,7 @@ class Server {
 
               return level;
             };
-            
+
             if (typeof proxyOptions.logLevel === "undefined") {
               proxyOptions.logLevel = getLogLevelForProxy(
                 compilerOptions.infrastructureLogging
@@ -1581,28 +1581,6 @@ class Server {
       });
   }
 
-  close(callback) {
-    if (this.webSocketServer) {
-      this.webSocketServer.implementation.close();
-    }
-
-    const prom = Promise.all(
-      this.staticWatchers.map((watcher) => watcher.close())
-    );
-    this.staticWatchers = [];
-
-    if (this.server) {
-      this.server.kill(() => {
-        // watchers must be closed before closing middleware
-        prom.then(() => {
-          this.middleware.close(callback);
-        });
-      });
-    } else if (callback) {
-      callback();
-    }
-  }
-
   getStats(statsObj) {
     const stats = Server.DEFAULT_STATS;
     const compilerOptions = this.getCompilerOptions();
@@ -1942,66 +1920,6 @@ class Server {
     this.stop().then(() => callback(null), callback);
   }
 
-  // TODO remove in the next major release
-  listen(port, hostname, fn) {
-    util.deprecate(
-      () => {},
-      "'listen' is deprecated. Please use async 'start' or 'startCallback' methods.",
-      "DEP_WEBPACK_DEV_SERVER_LISTEN"
-    )();
-
-    this.logger = this.compiler.getInfrastructureLogger("webpack-dev-server");
-
-    if (typeof port === "function") {
-      fn = port;
-    }
-
-    if (
-      typeof port !== "undefined" &&
-      typeof this.options.port !== "undefined" &&
-      port !== this.options.port
-    ) {
-      this.options.port = port;
-
-      this.logger.warn(
-        'The "port" specified in options is different from the port passed as an argument. Will be used from arguments.'
-      );
-    }
-
-    if (!this.options.port) {
-      this.options.port = port;
-    }
-
-    if (
-      typeof hostname !== "undefined" &&
-      typeof this.options.host !== "undefined" &&
-      hostname !== this.options.host
-    ) {
-      this.options.host = hostname;
-
-      this.logger.warn(
-        'The "host" specified in options is different from the host passed as an argument. Will be used from arguments.'
-      );
-    }
-
-    if (!this.options.host) {
-      this.options.host = hostname;
-    }
-
-    return this.start()
-      .then(() => {
-        if (fn) {
-          fn.call(this.server);
-        }
-      })
-      .catch((error) => {
-        // Nothing
-        if (fn) {
-          fn.call(this.server, error);
-        }
-      });
-  }
-
   // TODO remove in the next major release
   close(callback) {
     util.deprecate(