diff --git a/main.js b/main.js
index 5f9745a..df9a634 100644
--- a/main.js
+++ b/main.js
@@ -1,5 +1,4 @@
 const smpp = require("smpp");
-const keyboard = require("keyboardjs");
 const fs = require("fs");
 const path = require("path");
 const EventEmitter = require("events");
@@ -13,6 +12,7 @@ const WebSocket = require("ws");
 const SERVER_PORT = process.env.SERVER_PORT || 8190;
 const WS_SERVER_PORT = process.env.WS_SERVER_PORT || 8191;
 const SESSIONS_FILE = process.env.SESSIONS_FILE || "sessions.json";
+const MIN_MESSAGE_SEND_UPDATE_DELAY = process.env.MIN_MESSAGE_SEND_UPDATE_DELAY || 500;
 
 
 [
diff --git a/package.json b/package.json
index 63171c1..c3e70b7 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,6 @@
   "dependencies": {
     "body-parser": "^1.20.2",
     "express": "^4.18.2",
-    "keyboardjs": "^2.7.0",
     "nanotimer": "^0.3.15",
     "smpp": "^0.6.0-rc.4",
     "ws": "^8.13.0"