diff --git a/.github/workflows/BuildAutomation.yml b/.github/workflows/BuildAutomation.yml
index 597576b..b1f9315 100644
--- a/.github/workflows/BuildAutomation.yml
+++ b/.github/workflows/BuildAutomation.yml
@@ -1,7 +1,8 @@
 name: Approve by automation
 
 on:
-  workflow_dispatch:
+  pull_request:
+    types: [opened, reopened]
 jobs:
   approve-pull-request:
     runs-on: ubuntu-latest
@@ -11,4 +12,4 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          gh pr review ${{ env.PR_NUMBER }} --approve --body "approved by automation"
\ No newline at end of file
+          gh pr review ${{ github.event.pull_request.number }} --approve --body "approved by automation"
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 50388fb..c514ad8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Change Log
 
+## 4.0.1 (Sep 25, 2024)
+### Improvements
+ - Improved WebSocket connection
+
 ## 4.0.0 (Sep 3, 2024)
 ### Features
 - Added group channel collection
diff --git a/netstandard2.0/SendbirdChat.deps.json b/netstandard2.0/SendbirdChat.deps.json
index 5c7dab8..984409a 100644
--- a/netstandard2.0/SendbirdChat.deps.json
+++ b/netstandard2.0/SendbirdChat.deps.json
@@ -7,7 +7,7 @@
   "targets": {
     ".NETStandard,Version=v2.0": {},
     ".NETStandard,Version=v2.0/": {
-      "SendbirdChat/4.0.0": {
+      "SendbirdChat/4.0.1": {
         "dependencies": {
           "NETStandard.Library": "2.0.3",
           "Newtonsoft.Json": "13.0.3"
@@ -33,7 +33,7 @@
     }
   },
   "libraries": {
-    "SendbirdChat/4.0.0": {
+    "SendbirdChat/4.0.1": {
       "type": "project",
       "serviceable": false,
       "sha512": ""
diff --git a/netstandard2.0/SendbirdChat.dll b/netstandard2.0/SendbirdChat.dll
index 74e453b..6f01ad9 100644
Binary files a/netstandard2.0/SendbirdChat.dll and b/netstandard2.0/SendbirdChat.dll differ
diff --git a/netstandard2.0/SendbirdChat.pdb b/netstandard2.0/SendbirdChat.pdb
index 574dadc..5c4e855 100644
Binary files a/netstandard2.0/SendbirdChat.pdb and b/netstandard2.0/SendbirdChat.pdb differ