diff --git a/package.json b/package.json
index ad097e0..7186625 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,7 @@
     "cookie-parser": "^1.4.3",
     "core-js": "^2.4.1",
     "express": "^4.14.0",
+    "express-bouncer": "^0.2.0",
     "express-graphql": "^0.6.1",
     "express-jwt": "^5.1.0",
     "fastclick": "^1.0.6",
diff --git a/src/components/RsvpButton/RsvpButton.js b/src/components/RsvpButton/RsvpButton.js
index c353b46..cc018e0 100644
--- a/src/components/RsvpButton/RsvpButton.js
+++ b/src/components/RsvpButton/RsvpButton.js
@@ -29,7 +29,6 @@ class RsvpButton extends React.Component {
   }
 
   handleRsvpBlur = () => {
-    this.setState({ inputInvalidMsg: null });
     if (this.props.focusCallback) {
       this.props.focusCallback(false);
     }
@@ -54,6 +53,18 @@ class RsvpButton extends React.Component {
     }).then(data => {
       if (data.status === 200) {
         location.href = data.url;
+      } else if (data.status === 429) {
+        this.setState({
+          inputInvalid: true,
+          inputInvalidMsg: 'You have made too many incorrect attempts. Please try again later.',
+          inputDisabled: true,
+        });
+        setTimeout(() => {
+          this.setState({
+            inputInvalid: false,
+            inputDisabled: false,
+          });
+        }, 10 * 60 * 1000);
       } else {
         this.setState({
           inputInvalid: true,
@@ -111,6 +122,7 @@ class RsvpButton extends React.Component {
                 onFocus={this.handleRsvpFocus}
                 onBlur={this.handleRsvpBlur}
                 onChange={this.handleRsvpChange}
+                disabled={this.state.inputDisabled}
                 id="code"
                 type="text"
                 name="code"
diff --git a/src/server.js b/src/server.js
index 2a02cc8..a9a2937 100644
--- a/src/server.js
+++ b/src/server.js
@@ -10,6 +10,7 @@ import React from 'react';
 import ReactDOM from 'react-dom/server';
 import UniversalRouter from 'universal-router';
 import PrettyError from 'pretty-error';
+import Bouncer from 'express-bouncer';
 import App from './components/App';
 import Html from './components/Html';
 import { ErrorPageWithoutStyle } from './routes/error/ErrorPage';
@@ -28,6 +29,17 @@ import { sendSlackMsgWithDebounce } from './core/slack';
 const app = express();
 
 Rollbar.init();
+const bouncer = Bouncer(10 * 60 * 1000, 60 * 60 * 1000, 5);
+bouncer.blocked = (req, res, next, remaining) => {
+  let time = Math.ceil(remaining / 1000);
+  let suffix = ' seconds';
+  if (time > 120) {
+    time = Math.ceil(time / 60);
+    suffix = ' minutes';
+  }
+  const body = `You have made too many incorrect attempts. Please wait ${time} ${suffix}.`;
+  res.status(429).send(body);
+};
 
 // Tell any CSS tooling (such as Material UI) to use all vendor prefixes if the
 // user agent is not known.
@@ -84,15 +96,15 @@ app.use('/graphql', expressGraphQL(req => ({
 // -----------------------------------------------------------------------------
 //
 
-app.get('/:password', (req, res, next) => {
-  if (req.params.password.length !== 4) {
+app.get('/:code', (req, res, next) => {
+  if (req.params.code.length !== 4) {
     // Not a password
     next();
   } else {
-    Person.findAll({ where: { password: req.params.password } })
+    Person.findAll({ where: { password: req.params.code } })
       .then(data => {
         if (data.length > 0) {
-          res.redirect(`/rsvp/${req.params.password}`);
+          res.redirect(`/rsvp/${req.params.code}`);
         } else {
           next();
         }
@@ -107,6 +119,19 @@ app.post('/rsvp', (req, res) => {
   res.redirect(`/rsvp/${req.body.code}`);
 });
 
+app.get('/rsvp/:code', bouncer.block, (req, res, next) => {
+  Person.findAll({ where: { password: req.params.code } })
+  .then(data => {
+    if (data.length > 0) {
+      bouncer.reset(req);
+    }
+    next();
+  }).catch((err) => {
+    Rollbar.handleError(err);
+    next(err);
+  });
+});
+
 app.post('/rsvp/save', (req, res) => {
   try {
     const update = {};
diff --git a/yarn.lock b/yarn.lock
index c0f0094..73e87c5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2513,6 +2513,10 @@ expand-range@^1.8.1:
   dependencies:
     fill-range "^2.1.0"
 
+express-bouncer@^0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/express-bouncer/-/express-bouncer-0.2.0.tgz#392058966f6dfb991e7b651a1a3f0a363193cb04"
+
 express-graphql@^0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/express-graphql/-/express-graphql-0.6.1.tgz#cd9d144ac4d191b34a4261ac3a56fa407d5e19e8"
@@ -4042,11 +4046,11 @@ lodash@^3.10.1:
   version "3.10.1"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-3.10.1.tgz#5bf45e8e49ba4189e17d482789dfd15bd140b7b6"
 
-lodash@^4.0.0, lodash@^4.16.4, lodash@^4.17.2, lodash@^4.6.1:
+lodash@^4.0.0, lodash@^4.15.0, lodash@^4.16.4, lodash@^4.17.2, lodash@^4.6.1:
   version "4.17.2"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.2.tgz#34a3055babe04ce42467b607d700072c7ff6bf42"
 
-lodash@^4.1.0, lodash@^4.15.0, lodash@^4.17.4, lodash@^4.3.0:
+lodash@^4.1.0, lodash@^4.17.4, lodash@^4.3.0:
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"