diff --git a/package-lock.json b/package-lock.json
index 868bdc2..cc936d5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -951,9 +951,9 @@
       "integrity": "sha512-pNgbURSuab90KbTqvRPsseaTxOJCZBD0a7t+haSN33piP9cCM4l0CqdzAif2hUqm716UovKB2ROmiabGAKVXyg=="
     },
     "humanize-duration": {
-      "version": "3.10.1",
-      "resolved": "https://registry.npmjs.org/humanize-duration/-/humanize-duration-3.10.1.tgz",
-      "integrity": "sha512-FHD+u5OKj8TSsSdMHJxSCC78N5Rt4ecil6sWvI+xPbUKhxvHmkKo/V8imbR1m2dXueZYLIl7PcSYX9i/oEiOIA=="
+      "version": "3.12.1",
+      "resolved": "https://registry.npmjs.org/humanize-duration/-/humanize-duration-3.12.1.tgz",
+      "integrity": "sha512-Eu68Xnq5C38391em1zfVy8tiapQrOvTNTlWpax9smHMlEEUcudXrdMfXMoMRyZx4uODowYgi1AYiMzUXEbG+sA=="
     },
     "ignore": {
       "version": "3.3.3",
diff --git a/package.json b/package.json
index 111abda..a312360 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
   "author": "",
   "dependencies": {
     "eris": "^0.8.4",
-    "humanize-duration": "^3.10.0",
+    "humanize-duration": "^3.12.1",
     "knex": "^0.14.2",
     "mime": "^1.3.4",
     "moment": "^2.21.0",
diff --git a/src/index.js b/src/index.js
index 96db8f9..85e0a95 100644
--- a/src/index.js
+++ b/src/index.js
@@ -12,7 +12,20 @@ const path = require('path');
 try {
   fs.accessSync(path.join(__dirname, '..', 'node_modules'));
 } catch (e) {
-  console.error('Please run "npm install" before trying to start the bot.');
+  console.error('Please run "npm install" before starting the bot');
+  process.exit(1);
+}
+
+let testedPackage = '';
+try {
+  const packageJson = require('../package.json');
+  const modules = Object.keys(packageJson.dependencies);
+  modules.forEach(mod => {
+    testedPackage = mod;
+    fs.accessSync(path.join(__dirname, '..', 'node_modules', mod))
+  });
+} catch (e) {
+  console.error(`Please run "npm install" again! Package "${testedPackage}" is missing.`);
   process.exit(1);
 }
 
diff --git a/src/main.js b/src/main.js
index 157d09e..000c025 100644
--- a/src/main.js
+++ b/src/main.js
@@ -1,6 +1,6 @@
 const Eris = require('eris');
 const moment = require('moment');
-const transliterate = require('transliteration');
+const humanizeDuration = require('humanize-duration');
 
 const config = require('./config');
 const bot = require('./bot');
@@ -23,6 +23,7 @@ const {ACCIDENTAL_THREAD_MESSAGES} = require('./data/constants');
 const messageQueue = new Queue();
 
 const addInboxServerCommand = (...args) => threadUtils.addInboxServerCommand(bot, ...args);
+const humanizeDelay = (delay, opts = {}) => humanizeDuration(delay, Object.assign({conjunction: ' and '}, opts));
 
 // Once the bot has connected, set the status/"playing" message
 bot.on('ready', () => {
@@ -256,7 +257,7 @@ addInboxServerCommand('close', async (msg, args, thread) => {
   if (args.length) {
     if (args[0] === 'cancel') {
       // Cancel timed close
-      // The string type check is due to a knex bug, see https://github.com/tgriesser/knex/issues/1276
+      // The string type check is due to a knex bug, see https://github.com/tgriesser/knex/issues/1276git
       if (thread.scheduled_close_at) {
         await thread.cancelScheduledClose();
         thread.postSystemMessage(`Cancelled scheduled closing`);
@@ -267,14 +268,14 @@ addInboxServerCommand('close', async (msg, args, thread) => {
 
     // Set a timed close
     const delay = utils.convertDelayStringToMS(args.join(' '));
-    if (delay === 0) {
+    if (delay === 0 || delay === null) {
       thread.postSystemMessage(`Invalid delay specified. Format: "1h30m"`);
       return;
     }
 
     const closeAt = moment.utc().add(delay, 'ms');
     await thread.scheduleClose(closeAt.format('YYYY-MM-DD HH:mm:ss'), msg.author);
-    thread.postSystemMessage(`Thread is scheduled to be closed ${moment.duration(delay).humanize(true)} by ${msg.author.username}. Use \`${config.prefix}close cancel\` to cancel.`);
+    thread.postSystemMessage(`Thread is now scheduled to be closed in ${humanizeDelay(delay)}. Use \`${config.prefix}close cancel\` to cancel.`);
 
     return;
   }
diff --git a/src/utils.js b/src/utils.js
index 474247d..8177a5b 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -203,14 +203,24 @@ function trimAll(str) {
  * @returns {Number}
  */
 function convertDelayStringToMS(str) {
-  const regex = /([0-9]+)\s*([hms])/g;
+  const regex = /^([0-9]+)\s*([dhms])?[a-z]*\s*/;
   let match;
   let ms = 0;
 
-  while (match = regex.exec(str)) {
-    if (match[2] === 'h') ms += match[1] * 1000 * 60 * 60;
+  str = str.trim();
+
+  while (str !== '' && (match = str.match(regex)) !== null) {
+    if (match[2] === 'd') ms += match[1] * 1000 * 60 * 60 * 24;
+    else if (match[2] === 'h') ms += match[1] * 1000 * 60 * 60;
     else if (match[2] === 'm') ms += match[1] * 1000 * 60;
-    else if (match[2] === 's') ms += match[1] * 1000;
+    else if (match[2] === 's' || ! match[2]) ms += match[1] * 1000;
+
+    str = str.slice(match[0].length);
+  }
+
+  // Invalid delay string
+  if (str !== '') {
+    return null;
   }
 
   return ms;