diff --git a/lib/clients/web/facets/conversations.js b/lib/clients/web/facets/conversations.js
new file mode 100644
index 000000000..89d368f9a
--- /dev/null
+++ b/lib/clients/web/facets/conversations.js
@@ -0,0 +1,341 @@
+/**
+ * API Facet to make calls to methods in the conversations namespace.
+ *
+ * This provides functions to call:
+ *   - archive: {@link https://api.slack.com/methods/conversations.archive|conversations.archive}
+ *   - close: {@link https://api.slack.com/methods/conversations.close|conversations.close}
+ *   - create: {@link https://api.slack.com/methods/conversations.create|conversations.create}
+ *   - history: {@link https://api.slack.com/methods/conversations.history|conversations.history}
+ *   - info: {@link https://api.slack.com/methods/conversations.info|conversations.info}
+ *   - invite: {@link https://api.slack.com/methods/conversations.invite|conversations.invite}
+ *   - join: {@link https://api.slack.com/methods/conversations.join|conversations.join}
+ *   - kick: {@link https://api.slack.com/methods/conversations.kick|conversations.kick}
+ *   - leave: {@link https://api.slack.com/methods/conversations.leave|conversations.leave}
+ *   - list: {@link https://api.slack.com/methods/conversations.list|conversations.list}
+ *   - members: {@link https://api.slack.com/methods/conversations.members|conversations.members}
+ *   - open: {@link https://api.slack.com/methods/conversations.open|conversations.open}
+ *   - rename: {@link https://api.slack.com/methods/conversations.rename|conversations.rename}
+ *   - replies: {@link https://api.slack.com/methods/conversations.rename|conversations.replies}
+ *   - setPurpose: {@link https://api.slack.com/methods/conversations.setPurpose|conversations.setPurpose}
+ *   - setTopic: {@link https://api.slack.com/methods/conversations.setTopic|conversations.setTopic}
+ *   - unarchive: {@link https://api.slack.com/methods/conversations.unarchive|conversations.unarchive}
+ *
+ */
+
+
+function ConversationsFacet(makeAPICall) {
+  this.name = 'conversations';
+  this.makeAPICall = makeAPICall;
+}
+
+
+/**
+ * Archives a conversation.
+ * @see {@link https://api.slack.com/methods/conversations.archive|conversations.archive}
+ *
+ * @param {?} channel - ID of conversation to archive
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.archive = function archive(channel, optCb) {
+  var requiredArgs = {
+    channel: channel
+  };
+
+  return this.makeAPICall('conversations.archive', requiredArgs, null, optCb);
+};
+
+/**
+ * Closes a direct message or multi-person direct message.
+ * @see {@link https://api.slack.com/methods/conversations.close|conversations.close}
+ *
+ * @param {?} channel - Conversation to close.
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.close = function close(channel, optCb) {
+  var requiredArgs = {
+    channel: channel
+  };
+
+  return this.makeAPICall('conversations.close', requiredArgs, null, optCb);
+};
+
+/**
+ * Initiates a public or private channel-based conversation
+ * @see {@link https://api.slack.com/methods/conversations.create|conversations.create}
+ *
+ * @param {?} name - Name of the public or private channel to create
+ * @param {Object=} opts
+ * @param {?} opts.is_private - Create a private channel instead of a public one
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.create = function create(name, opts, optCb) {
+  var requiredArgs = {
+    name: name
+  };
+
+  return this.makeAPICall('conversations.create', requiredArgs, opts, optCb);
+};
+
+/**
+ * Fetches a conversation's history of messages and events.
+ * @see {@link https://api.slack.com/methods/conversations.history|conversations.history}
+ *
+ * @param {?} channel - Conversation ID to fetch history for.
+ * @param {Object=} opts
+ * @param {?} opts.latest - End of time range of messages to include in results.
+ * @param {?} opts.oldest - Start of time range of messages to include in results.
+ * @param {?} opts.cursor - Paginate through collections of data by setting the cursor parameter to
+ * a next_cursor attribute returned by a previous request's response_metadata. Default value fetches
+ * the first "page" of the collection. See pagination for more detail.
+ * @param {?} opts.limit - The maximum number of items to return. Fewer than the requested number of
+ * items may be returned, even if the end of the users list hasn't been reached.
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.history = function history(channel, opts, optCb) {
+  var requiredArgs = {
+    channel: channel
+  };
+
+  return this.makeAPICall('conversations.history', requiredArgs, opts, optCb);
+};
+
+
+/**
+ * Retrieve information about a conversation.
+ * @see {@link https://api.slack.com/methods/conversations.info|conversations.info}
+ *
+ * @param {?} channel - Channel to get info on
+ * @param {Object=} opts
+ * @param {?} opts.include_locale - Set this to `true` to receive the locale for this conversation.
+ * Defaults to `false`
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.info = function info(channel, opts, optCb) {
+  var requiredArgs = {
+    channel: channel
+  };
+
+  return this.makeAPICall('conversations.info', requiredArgs, null, optCb);
+};
+
+
+/**
+ * Invites users to a channel.
+ * @see {@link https://api.slack.com/methods/conversations.invite|conversations.invite}
+ *
+ * @param {?} channel - The ID of the public or private channel to invite user(s) to.
+ * @param {?} users - A comma separated list of user IDs. Up to 30 users may be listed.
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.invite = function invite(channel, users, optCb) {
+  var requiredArgs = {
+    channel: channel,
+    users: users
+  };
+
+  return this.makeAPICall('conversations.invite', requiredArgs, null, optCb);
+};
+
+
+/**
+ * Joins an existing conversation.
+ * @see {@link https://api.slack.com/methods/conversations.join|conversations.join}
+ *
+ * @param {?} channel - ID of conversation to join
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.join = function join(channel, optCb) {
+  var requiredArgs = {
+    channel: channel
+  };
+
+  return this.makeAPICall('conversations.join', requiredArgs, null, optCb);
+};
+
+
+/**
+ * Removes a user from a conversation.
+ * @see {@link https://api.slack.com/methods/conversations.kick|conversations.kick}
+ *
+ * @param {?} channel - ID of conversation to remove user from.
+ * @param {?} user - User to remove from channel.
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.kick = function kick(channel, user, optCb) {
+  var requiredArgs = {
+    channel: channel,
+    user: user
+  };
+
+  return this.makeAPICall('conversations.kick', requiredArgs, null, optCb);
+};
+
+
+/**
+ * Leaves a channel.
+ * @see {@link https://api.slack.com/methods/conversations.leave|conversations.leave}
+ *
+ * @param {?} channel - Channel to leave
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.leave = function leave(channel, optCb) {
+  var requiredArgs = {
+    channel: channel
+  };
+
+  return this.makeAPICall('conversations.leave', requiredArgs, null, optCb);
+};
+
+
+/**
+ * Lists all conversations in a Slack team.
+ * @see {@link https://api.slack.com/methods/conversations.list|conversations.list}
+ *
+ * @param {Object=} opts
+ * @param {?} opts.exclude_archived - Set to `true` to exclude archived channels from the list
+ * @param {?} opts.types - Mix and match channel types by providing a comma-separated list of any
+ * combination of `public_channel`, `private_channel`, `mpim`, `im`
+ * @param {?} opts.cursor - Paginate through collections of data by setting the cursor parameter to
+ * a next_cursor attribute returned by a previous request's response_metadata. Default value fetches
+ * the first "page" of the collection. See pagination for more detail.
+ * @param {?} opts.limit - The maximum number of items to return. Fewer than the requested number of
+ * items may be returned, even if the end of the users list hasn't been reached.
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.list = function list(opts, optCb) {
+  return this.makeAPICall('conversations.list', null, opts, optCb);
+};
+
+
+/**
+ * Retrieve members of a conversation.
+ * @see {@link https://api.slack.com/methods/conversations.members|conversations.members}
+ *
+ * @param {?} channel - ID of the conversation to retrieve members for
+ * @param {Object=} opts
+ * @param {?} opts.cursor - Paginate through collections of data by setting the cursor parameter to
+ * a next_cursor attribute returned by a previous request's response_metadata. Default value fetches
+ * the first "page" of the collection. See pagination for more detail.
+ * @param {?} opts.limit - The maximum number of items to return. Fewer than the requested number of
+ * items may be returned, even if the end of the users list hasn't been reached.
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.members = function members(channel, opts, optCb) {
+  var requiredArgs = {
+    channel: channel
+  };
+
+  return this.makeAPICall('conversations.members', requiredArgs, opts, optCb);
+};
+
+/**
+ * Opens or resumes a direct message or multi-person direct message.
+ * @see {@link https://api.slack.com/methods/conversations.open|conversations.open}
+ *
+ * @param {Object=} opts
+ * @param {?} opts.channel - Resume a conversation by supplying an im or mpim's ID. Or provide the
+ * users field instead.
+ * @param {?} opts.return_im - Boolean, indicates you want the full IM channel definition in the
+ * response.
+ * @param {?} opts.users - Comma separated lists of users. If only one user is included, this
+ * creates a 1:1 DM. The ordering of the users is preserved whenever a multi-person direct message
+ * is returned. Supply a channel when not supplying users.
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.open = function open(opts, optCb) {
+  return this.makeAPICall('conversations.open', null, opts, optCb);
+};
+
+/**
+ * Renames a conversation.
+ * @see {@link https://api.slack.com/methods/conversations.rename|conversations.rename}
+ *
+ * @param {?} channel - ID of conversation to rename
+ * @param {?} name - New name for conversation.
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.rename = function rename(channel, name, optCb) {
+  var requiredArgs = {
+    channel: channel,
+    name: name
+  };
+
+  return this.makeAPICall('conversations.rename', requiredArgs, null, optCb);
+};
+
+/**
+ * Retrieve a thread of messages posted to a conversation
+ * @see {@link https://api.slack.com/methods/conversations.replies|conversations.replies}
+ *
+ * @param {?} channel - Conversation ID to fetch thread from
+ * @param {?} ts - Unique identifier of a thread's parent message
+ * @param {Object=} opts
+ * @param {?} opts.cursor - Paginate through collections of data by setting the cursor parameter to
+ * a next_cursor attribute returned by a previous request's response_metadata. Default value fetches
+ * the first "page" of the collection. See pagination for more detail.
+ * @param {?} opts.limit - The maximum number of items to return. Fewer than the requested number of
+ * items may be returned, even if the end of the users list hasn't been reached.
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.replies = function replies(channel, ts, opts, optCb) {
+  var requiredArgs = {
+    channel: channel,
+    ts: ts
+  };
+
+  return this.makeAPICall('conversations.replies', requiredArgs, opts, optCb);
+};
+
+/**
+ * Sets the purpose for a conversation.
+ * @see {@link https://api.slack.com/methods/conversations.setPurpose|conversations.setPurpose}
+ *
+ * @param {?} channel - Conversation to set the purpose of
+ * @param {?} purpose - A new, specialer purpose
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.setPurpose = function setPurpose(channel, purpose, optCb) {
+  var requiredArgs = {
+    channel: channel,
+    purpose: purpose
+  };
+
+  return this.makeAPICall('conversations.setPurpose', requiredArgs, null, optCb);
+};
+
+
+/**
+ * Sets the topic for a conversation.
+ * @see {@link https://api.slack.com/methods/conversations.setTopic|conversations.setTopic}
+ *
+ * @param {?} channel - Conversation to set the topic of
+ * @param {?} topic - The new topic string. Does not support formatting or linkification.
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.setTopic = function setTopic(channel, topic, optCb) {
+  var requiredArgs = {
+    channel: channel,
+    topic: topic
+  };
+
+  return this.makeAPICall('conversations.setTopic', requiredArgs, null, optCb);
+};
+
+
+/**
+ * Reverses conversation archival.
+ * @see {@link https://api.slack.com/methods/conversations.unarchive|conversations.unarchive}
+ *
+ * @param {?} channel - ID of conversation to unarchive
+ * @param {function=} optCb Optional callback, if not using promises.
+ */
+ConversationsFacet.prototype.unarchive = function unarchive(channel, optCb) {
+  var requiredArgs = {
+    channel: channel
+  };
+
+  return this.makeAPICall('conversations.unarchive', requiredArgs, null, optCb);
+};
+
+
+module.exports = ConversationsFacet;
diff --git a/lib/clients/web/facets/index.js b/lib/clients/web/facets/index.js
index 1d756c9be..b03eda70a 100644
--- a/lib/clients/web/facets/index.js
+++ b/lib/clients/web/facets/index.js
@@ -4,6 +4,7 @@ module.exports = {
   BotsFacet: require('./bots'),
   ChannelsFacet: require('./channels.js'),
   ChatFacet: require('./chat.js'),
+  ConversationsFacet: require('./conversations.js'),
   DndFacet: require('./dnd.js'),
   EmojiFacet: require('./emoji.js'),
   FilesFacet: require('./files.js'),
diff --git a/lib/clients/web/facets/rtm.js b/lib/clients/web/facets/rtm.js
index 1d39f80db..8c1890adb 100644
--- a/lib/clients/web/facets/rtm.js
+++ b/lib/clients/web/facets/rtm.js
@@ -23,6 +23,8 @@ function RtmFacet(makeAPICall) {
  * @param {Boolean} opts.no_unreads     Skip unread counts for each channel (improves performance).
  * @param {Boolean} opts.mpim_aware     Returns MPIMs to the client in the API response.
  * @param {Boolean} opts.presence_sub   Support presence subscriptions on this socket connection.
+ * @param {Boolean} opts.include_locale Set this to `true` to receive the locale for users and
+ *                                      channels. Defaults to `false`
  * @param {Function} optCb              Optional callback, if not using promises.
  */
 RtmFacet.prototype.start = function start(opts, optCb) {
diff --git a/lib/clients/web/facets/users.js b/lib/clients/web/facets/users.js
index 7307d384e..d667388b1 100644
--- a/lib/clients/web/facets/users.js
+++ b/lib/clients/web/facets/users.js
@@ -67,6 +67,8 @@ UsersFacet.prototype.info = function info(user, optCb) {
  *
  * @param {Object=} opts
  * @param {?} opts.presence - Whether to include presence data in the output
+ * @param {?} opts.include_locale - Set this to `true` to receive the locale for users. Defaults to
+ * `false`
  * @param {function=} optCb Optional callback, if not using promises.
  */
 UsersFacet.prototype.list = function list(opts, optCb) {