diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 273db1be..10620f3b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -14,7 +14,7 @@ jobs:
           - { ruby: "3.3" }
           - { ruby: ruby-head, ignore: true }
           - { ruby: jruby-head, ignore: true }
-    name: test (ruby=${{ matrix.entry.ruby }}, concurrency=${{ matrix.entry.concurrency || 'none' }})
+    name: test (ruby=${{ matrix.entry.ruby }}${{ matrix.entry.concurrency && ', concurrency=' }}${{ matrix.entry.concurrency }})
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -35,8 +35,19 @@ jobs:
           RACK_ENV: test
         run: bundle exec rake
       - name: Coveralls
-        uses: coverallsapp/github-action@master
+        uses: coverallsapp/github-action@v2
         with:
+          parallel: true
           github-token: ${{ secrets.GITHUB_TOKEN }}
-      - name: Coveralls Finished
-        uses: coverallsapp/github-action@master
+          flag-name: run-${{ matrix.entry.ruby }}${{ matrix.entry.concurrency && '-'}}${{ matrix.entry.concurrency }}
+
+  finish:
+    name: coveralls
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Close Parallel Build
+        uses: coverallsapp/github-action@v2
+        with:
+          parallel-finished: true
+          carryforward: 'run-2.7,run-2.7-async-websocket,run-3.0,run-3.1,run-3.2,run-3.3'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 64dc6964..ac0c470a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,8 @@
-### 2.3.1 (Next)
+### 2.4.0 (Next)
 
 * [#516](https://github.com/slack-ruby/slack-ruby-client/pull/516): Add support for Ruby 3.3 - [@olleolleolle](https://github.com/olleolleolle).
-* [#520](https://github.com/slack-ruby/slack-ruby-client/pull/520): Support basic markdown formatting - [@nbgoodall](https://github.com/nbgoodall).
+* [#520](https://github.com/slack-ruby/slack-ruby-client/pull/520): Add support for basic markdown formatting - [@nbgoodall](https://github.com/nbgoodall).
+* [#523](https://github.com/slack-ruby/slack-ruby-client/pull/523): Fix coveralls handling parallel jobs - [@dblock](https://github.com/dblock).
 * Your contribution here.
 
 ### 2.3.0 (2024/01/31)
diff --git a/lib/slack/version.rb b/lib/slack/version.rb
index aa1ddd76..81afe259 100644
--- a/lib/slack/version.rb
+++ b/lib/slack/version.rb
@@ -1,4 +1,4 @@
 # frozen_string_literal: true
 module Slack
-  VERSION = '2.3.1'
+  VERSION = '2.4.0'
 end