diff --git a/bun.lock b/bun.lock
index af9f2ea..ba368c1 100644
--- a/bun.lock
+++ b/bun.lock
@@ -10,6 +10,7 @@
         "bcrypt": "^5.1.1",
         "body-parser": "^1.20.3",
         "colors": "^1.4.0",
+        "disposable-email-detector": "^3.0.0",
         "dotenv": "^16.4.7",
         "express": "^4.21.2",
         "express-jsdoc-swagger": "^1.8.0",
@@ -342,6 +343,8 @@
 
     "diff": ["diff@5.2.0", "", {}, "sha512-uIFDxqpRZGZ6ThOk84hEfqWoHx2devRFvpTZcTHur85vImfaxUbTW9Ryh4CpCuDnToOP1CEtXKIgytHBPVff5A=="],
 
+    "disposable-email-detector": ["disposable-email-detector@3.0.0", "", { "dependencies": { "disposable-email-detector": "^1.0.1" } }, "sha512-q/7bq+vXAupa8Z9eGlrpJ8qJ0Q3j8cgs15qvvdJNVnmFso8ludFFBVXoj4ALRfy66K92T9xdyWxl98RX9jlAiw=="],
+
     "doctrine": ["doctrine@3.0.0", "", { "dependencies": { "esutils": "^2.0.2" } }, "sha512-yS+Q5i3hBf7GBkd4KG8a7eBNNWNGLTaEwwYWUijIYM7zrlYDM0BFXHjjPWlWZ1Rg7UaddZeIDmi9jF3HmqiQ2w=="],
 
     "dotenv": ["dotenv@16.4.7", "", {}, "sha512-47qPchRCykZC03FhkYAhrvwU4xDBFIj1QPqaarj6mdM/hgUzfPHcpkHJOn3mJAufFeeAxAzeGsr5X0M4k6fLZQ=="],
@@ -732,6 +735,8 @@
 
     "body-parser/debug": ["debug@2.6.9", "", { "dependencies": { "ms": "2.0.0" } }, "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA=="],
 
+    "disposable-email-detector/disposable-email-detector": ["disposable-email-detector@1.0.3", "", { "dependencies": { "disposable-email-detector": "^1.0.1" } }, "sha512-hqVTnwz4B8iuFefKcp6I3m8J/ZXiNzBZROD2t3lS2cZlo+/hkKrsMvn9i9wyuXTGZ0WUblC8h/gSzybF9nVWiQ=="],
+
     "express/debug": ["debug@2.6.9", "", { "dependencies": { "ms": "2.0.0" } }, "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA=="],
 
     "express-jsdoc-swagger/chalk": ["chalk@4.1.2", "", { "dependencies": { "ansi-styles": "^4.1.0", "supports-color": "^7.1.0" } }, "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA=="],
diff --git a/package.json b/package.json
index b122ff4..131c697 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
     "bcrypt": "^5.1.1",
     "body-parser": "^1.20.3",
     "colors": "^1.4.0",
+    "disposable-email-detector": "^3.0.0",
     "dotenv": "^16.4.7",
     "express": "^4.21.2",
     "express-jsdoc-swagger": "^1.8.0",
diff --git a/src/routes/user.ts b/src/routes/user.ts
index 1e67fce..99bd851 100644
--- a/src/routes/user.ts
+++ b/src/routes/user.ts
@@ -1,5 +1,6 @@
 import { sInvite } from "@prisma/client";
 import bcrypt from "bcrypt";
+import disposableEmailDetector from "disposable-email-detector";
 import express from "express";
 
 import { inviteToSlack } from "../func/slackInvite";
@@ -52,6 +53,13 @@ router.post("/signup", async (req, res) => {
     return;
   }
 
+  let isDisposable = await disposableEmailDetector(email);
+
+  if (isDisposable) {
+    res.status(400).json("Disposable email addresses are not allowed");
+    return;
+  }
+
   // Check if the user already exists
   const user = await prisma.user.findUnique({
     where: {