diff --git a/.travis.yml b/.travis.yml
index 6fecb4d..d787f9c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,8 @@ services:
 before_install: 
   - plugin_name=${PWD##*/} && echo $plugin_name
 
+install: true # Prevent travis doing bundle install
+
 script: 
   - >
     docker run
diff --git a/lib/discourse_chat/provider/slack/slack_command_controller.rb b/lib/discourse_chat/provider/slack/slack_command_controller.rb
index f36defd..a504359 100644
--- a/lib/discourse_chat/provider/slack/slack_command_controller.rb
+++ b/lib/discourse_chat/provider/slack/slack_command_controller.rb
@@ -26,8 +26,6 @@ module DiscourseChat::Provider::SlackProvider
         case params[:channel_name]
         when 'directmessage'
           "@#{params[:user_name]}"
-        when 'privategroup'
-          params[:channel_id]
         else
           "##{params[:channel_name]}"
         end
@@ -58,9 +56,16 @@ module DiscourseChat::Provider::SlackProvider
       Scheduler::Defer.later "Processing slack transcript request" do
         requested_messages = nil
         first_message_ts = nil
+        requested_thread_ts = nil
 
+        thread_url_regex = /^https:\/\/\S+\.slack\.com\/archives\/\S+\/p[0-9]{16}\?thread_ts=([0-9]{10}.[0-9]{6})\S*$/
         slack_url_regex = /^https:\/\/\S+\.slack\.com\/archives\/\S+\/p([0-9]{16})\/?$/
-        if tokens.size > 1 && match = slack_url_regex.match(tokens[1])
+
+        if tokens.size > 2 && tokens[1] == "thread" && match = slack_url_regex.match(tokens[2])
+          requested_thread_ts = match.captures[0].insert(10, '.')
+        elsif tokens.size > 1 && match = thread_url_regex.match(tokens[1])
+          requested_thread_ts = match.captures[0]
+        elsif tokens.size > 1 && match = slack_url_regex.match(tokens[1])
           first_message_ts = match.captures[0].insert(10, '.')
         elsif tokens.size > 1
           begin
@@ -72,7 +77,7 @@ module DiscourseChat::Provider::SlackProvider
 
         error_message = { text: I18n.t("chat_integration.provider.slack.transcript.error") }
 
-        return error_message unless transcript = SlackTranscript.new(channel_name: channel_name, channel_id: slack_channel_id)
+        return error_message unless transcript = SlackTranscript.new(channel_name: channel_name, channel_id: slack_channel_id, requested_thread_ts: requested_thread_ts)
         return error_message unless transcript.load_user_data
         return error_message unless transcript.load_chat_history
 
diff --git a/lib/discourse_chat/provider/slack/slack_transcript.rb b/lib/discourse_chat/provider/slack/slack_transcript.rb
index f24c23d..fe6d1e4 100644
--- a/lib/discourse_chat/provider/slack/slack_transcript.rb
+++ b/lib/discourse_chat/provider/slack/slack_transcript.rb
@@ -2,9 +2,10 @@ module DiscourseChat::Provider::SlackProvider
   class SlackTranscript
     attr_reader :users, :channel_id, :messages
 
-    def initialize(channel_name:, channel_id:)
+    def initialize(channel_name:, channel_id:, requested_thread_ts: nil)
       @channel_name = channel_name
       @channel_id = channel_id
+      @requested_thread_ts = requested_thread_ts
 
       @first_message_index = 0
       @last_message_index = -1 # We can use negative array indicies to select the last message - fancy!
@@ -30,6 +31,7 @@ module DiscourseChat::Provider::SlackProvider
 
     # Apply a heuristic to decide which is the first message in the current conversation
     def guess_first_message(skip_messages: 5) # Can skip the last n messages
+      return true if @requested_thread_ts # Always start thread on first message
 
       possible_first_messages = @messages[0..-skip_messages]
 
@@ -121,6 +123,8 @@ module DiscourseChat::Provider::SlackProvider
       secret = DiscourseChat::Helper.save_transcript(post_content)
       link = "#{Discourse.base_url}/chat-transcript/#{secret}"
 
+      return { text: "<#{link}|#{I18n.t("chat_integration.provider.slack.transcript.post_to_discourse")}>" } if @requested_thread_ts
+
       {
         text: "<#{link}|#{I18n.t("chat_integration.provider.slack.transcript.post_to_discourse")}>",
         attachments: [
@@ -201,29 +205,35 @@ module DiscourseChat::Provider::SlackProvider
       http = Net::HTTP.new("slack.com", 443)
       http.use_ssl = true
 
-      req = Net::HTTP::Post.new(URI('https://slack.com/api/channels.history'))
+      endpoint = @requested_thread_ts ? "replies" : "history"
+
+      req = Net::HTTP::Post.new(URI("https://slack.com/api/conversations.#{endpoint}"))
 
       data = {
         token: SiteSetting.chat_integration_slack_access_token,
         channel: @channel_id,
-        count: count
+        limit: count
       }
 
+      data[:ts] = @requested_thread_ts if @requested_thread_ts
+
       req.set_form_data(data)
       response = http.request(req)
       return false unless response.kind_of? Net::HTTPSuccess
       json = JSON.parse(response.body)
       return false unless json['ok']
 
-      raw_messages = json['messages'].reverse
+      raw_messages = json['messages']
+      raw_messages = raw_messages.reverse unless @requested_thread_ts
 
       # Build some message objects
       @messages = []
       raw_messages.each_with_index do |message, index|
         # Only load messages
         next unless message["type"] == "message"
-        # Don't load responses to threads (if ts==thread_ts then it's the thread parent)
-        next if message["thread_ts"] && message["thread_ts"] != message["ts"]
+
+        # Don't load responses to threads unless specifically requested (if ts==thread_ts then it's the thread parent)
+        next if !@requested_thread_ts && message["thread_ts"] && message["thread_ts"] != message["ts"]
 
         this_message = SlackMessage.new(message, self)
         @messages << this_message
diff --git a/spec/lib/discourse_chat/provider/slack/slack_command_controller_spec.rb b/spec/lib/discourse_chat/provider/slack/slack_command_controller_spec.rb
index 1c2def9..9b74604 100644
--- a/spec/lib/discourse_chat/provider/slack/slack_command_controller_spec.rb
+++ b/spec/lib/discourse_chat/provider/slack/slack_command_controller_spec.rb
@@ -196,7 +196,7 @@ describe 'Slack Command Controller', type: :request do
         context "with valid slack responses" do
           before do
             stub_request(:post, "https://slack.com/api/users.list").to_return(body: '{"ok":true,"members":[{"id":"U5Z773QLS","name":"david","profile":{"icon_24":"https://example.com/avatar"}}]}')
-            stub_request(:post, "https://slack.com/api/channels.history").to_return(body: { ok: true, messages: messages_fixture }.to_json)
+            stub_request(:post, "https://slack.com/api/conversations.history").to_return(body: { ok: true, messages: messages_fixture }.to_json)
           end
 
           it 'generates the transcript UI properly' do
@@ -231,6 +231,46 @@ describe 'Slack Command Controller', type: :request do
             expect(command_stub).to have_been_requested
           end
 
+          it 'can select by url with thread parameter' do
+            replies_stub = stub_request(:post, "https://slack.com/api/conversations.replies")
+              .with(body: /1501801629\.052212/)
+              .to_return(body: { ok: true, messages: messages_fixture }.to_json)
+
+            command_stub = stub_request(:post, "https://slack.com/commands/1234")
+              .to_return(body: { ok: true }.to_json)
+
+            post "/chat-integration/slack/command.json", params: {
+              text: "post https://sometestslack.slack.com/archives/C6029G78F/p1501201669054212?thread_ts=1501801629.052212",
+              response_url: 'https://hooks.slack.com/commands/1234',
+              channel_name: 'general',
+              channel_id: 'C6029G78F',
+              token: token
+            }
+
+            expect(command_stub).to have_been_requested
+            expect(replies_stub).to have_been_requested
+          end
+
+          it 'can select by thread' do
+            replies_stub = stub_request(:post, "https://slack.com/api/conversations.replies")
+              .with(body: /1501801629\.052212/)
+              .to_return(body: { ok: true, messages: messages_fixture }.to_json)
+
+            command_stub = stub_request(:post, "https://slack.com/commands/1234")
+              .to_return(body: { ok: true }.to_json)
+
+            post "/chat-integration/slack/command.json", params: {
+              text: "post thread https://sometestslack.slack.com/archives/C6029G78F/p1501801629052212",
+              response_url: 'https://hooks.slack.com/commands/1234',
+              channel_name: 'general',
+              channel_id: 'C6029G78F',
+              token: token
+            }
+
+            expect(command_stub).to have_been_requested
+            expect(replies_stub).to have_been_requested
+          end
+
           it 'can select by count' do
             command_stub = stub_request(:post, "https://slack.com/commands/1234")
               .with(body: /1501801629\.052212/)
diff --git a/spec/lib/discourse_chat/provider/slack/slack_transcript_spec.rb b/spec/lib/discourse_chat/provider/slack/slack_transcript_spec.rb
index 0cf262f..a764c70 100644
--- a/spec/lib/discourse_chat/provider/slack/slack_transcript_spec.rb
+++ b/spec/lib/discourse_chat/provider/slack/slack_transcript_spec.rb
@@ -105,7 +105,7 @@ RSpec.describe DiscourseChat::Provider::SlackProvider::SlackTranscript do
 
     describe 'loading history' do
       it 'loads messages correctly' do
-        stub_request(:post, "https://slack.com/api/channels.history")
+        stub_request(:post, "https://slack.com/api/conversations.history")
           .with(body: hash_including(token: "abcde", channel: 'G1234'))
           .to_return(status: 200, body: { ok: true, messages: messages_fixture }.to_json)
 
@@ -113,23 +113,43 @@ RSpec.describe DiscourseChat::Provider::SlackProvider::SlackTranscript do
       end
 
       it 'handles failed connection' do
-        stub_request(:post, "https://slack.com/api/channels.history")
+        stub_request(:post, "https://slack.com/api/conversations.history")
           .to_return(status: 500, body: {}.to_json)
 
           expect(transcript.load_chat_history).to be_falsey
       end
 
       it 'handles slack failure' do
-        stub_request(:post, "https://slack.com/api/channels.history")
+        stub_request(:post, "https://slack.com/api/conversations.history")
           .to_return(status: 200, body: { ok: false }.to_json)
 
           expect(transcript.load_chat_history).to be_falsey
       end
     end
 
+    context 'with thread_ts specified' do
+      let(:thread_transcript) { described_class.new(channel_name: "#general", channel_id: "G1234", requested_thread_ts: "1501801629.052212") }
+
+      before do
+        stub_request(:post, "https://slack.com/api/conversations.replies")
+          .with(body: hash_including(token: "abcde", channel: 'G1234', ts: "1501801629.052212"))
+          .to_return(status: 200, body: { ok: true, messages: messages_fixture }.to_json)
+        thread_transcript.load_chat_history
+      end
+
+      it 'includes messages in a thread' do
+        expect(thread_transcript.messages.length).to eq(7)
+      end
+
+      it 'loads in chronological order' do # replies API presents messages in actual chronological order
+        expect(thread_transcript.messages.first.ts).to eq('1501801665.062694')
+      end
+
+    end
+
     context 'with loaded messages' do
       before do
-        stub_request(:post, "https://slack.com/api/channels.history")
+        stub_request(:post, "https://slack.com/api/conversations.history")
           .with(body: hash_including(token: "abcde", channel: 'G1234'))
           .to_return(status: 200, body: { ok: true, messages: messages_fixture }.to_json)
         transcript.load_chat_history