diff --git a/CHANGELOG.md b/CHANGELOG.md
index a75a6c0..6035a19 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ Added:
 1. Add `metadata` argument in `message` event (and
    friends e.g. `text`, `audio`, etc.) (#409) (by @jlsjonas, @GochoMugo)
 1. Add support for Node.js v9 (by @GochoMugo)
+1. Document *TelegramBot.errors*, *TelegramBot.messageTypes* (by @GochoMugo)
 
 Changed:
 
diff --git a/doc/api.md b/doc/api.md
index 6f3676a..42516c5 100644
--- a/doc/api.md
+++ b/doc/api.md
@@ -83,6 +83,8 @@ TelegramBot
         * [.setStickerPositionInSet(sticker, position)](#TelegramBot+setStickerPositionInSet) ⇒ <code>Promise</code>
         * [.deleteStickerFromSet(sticker)](#TelegramBot+deleteStickerFromSet) ⇒ <code>Promise</code>
     * _static_
+        * [.errors](#TelegramBot.errors) : <code>Object</code>
+        * [.messageTypes](#TelegramBot.messageTypes) : <code>Array.&lt;String&gt;</code>
         * [.Promise](#TelegramBot.Promise)
 
 <a name="new_TelegramBot_new"></a>
@@ -1110,6 +1112,18 @@ Returns True on success.
 | --- | --- | --- |
 | sticker | <code>String</code> | File identifier of the sticker |
 
+<a name="TelegramBot.errors"></a>
+
+### TelegramBot.errors : <code>Object</code>
+The different errors the library uses.
+
+**Kind**: static property of <code>[TelegramBot](#TelegramBot)</code>  
+<a name="TelegramBot.messageTypes"></a>
+
+### TelegramBot.messageTypes : <code>Array.&lt;String&gt;</code>
+The types of message updates the library handles.
+
+**Kind**: static property of <code>[TelegramBot](#TelegramBot)</code>  
 <a name="TelegramBot.Promise"></a>
 
 ### TelegramBot.Promise
diff --git a/src/telegram.js b/src/telegram.js
index 86c9194..09891a3 100644
--- a/src/telegram.js
+++ b/src/telegram.js
@@ -74,11 +74,18 @@ if (!process.env.NTBA_FIX_319) {
 
 
 class TelegramBot extends EventEmitter {
-
+  /**
+   * The different errors the library uses.
+   * @type {Object}
+   */
   static get errors() {
     return errors;
   }
 
+  /**
+   * The types of message updates the library handles.
+   * @type {String[]}
+   */
   static get messageTypes() {
     return _messageTypes;
   }