diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 0247e3a8..dce009ee 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,3 +1,7 @@
+v8.1.4 (2022-08-??)
+-------------------
+[fix] fix regression in requestTimout option not accepting `0` as a value ([#1421](https://github.com/tediousjs/node-mssql/pull/1421))
+
 v8.1.3 (2022-08-08)
 -------------------
 [fix] requestTimeout correctly resolved ([#1398](https://github.com/tediousjs/node-mssql/pull/1398))
diff --git a/lib/msnodesqlv8/connection-pool.js b/lib/msnodesqlv8/connection-pool.js
index 497a2e0e..78de9e18 100644
--- a/lib/msnodesqlv8/connection-pool.js
+++ b/lib/msnodesqlv8/connection-pool.js
@@ -12,6 +12,14 @@ const CONNECTION_DRIVER = ['darwin', 'linux'].includes(platform()) ? 'ODBC Drive
 const CONNECTION_STRING_PORT = `Driver=${CONNECTION_DRIVER};Server=#{server},#{port};Database=#{database};Uid=#{user};Pwd=#{password};Trusted_Connection=#{trusted};Encrypt=#{encrypt};`
 const CONNECTION_STRING_NAMED_INSTANCE = `Driver=${CONNECTION_DRIVER};Server=#{server}\\#{instance};Database=#{database};Uid=#{user};Pwd=#{password};Trusted_Connection=#{trusted};Encrypt=#{encrypt};`
 
+function firstDefined () {
+  for (let i = 0; i < arguments.length; i++) {
+    if (typeof arguments[i] !== 'undefined') {
+      return arguments[i]
+    }
+  }
+}
+
 class ConnectionPool extends BaseConnectionPool {
   _poolCreate () {
     return new shared.Promise((resolve, reject) => {
@@ -21,11 +29,11 @@ class ConnectionPool extends BaseConnectionPool {
         defaultConnectionString = CONNECTION_STRING_NAMED_INSTANCE
       }
 
-      this.config.requestTimeout = this.config.requestTimeout || this.config.timeout || 15000
+      this.config.requestTimeout = firstDefined(this.config.requestTimeout, this.config.timeout, 15000)
 
       const cfg = {
         conn_str: this.config.connectionString || defaultConnectionString,
-        conn_timeout: (this.config.connectionTimeout || this.config.timeout || 15000) / 1000
+        conn_timeout: firstDefined(this.config.connectionTimeout, this.config.timeout, 15000) / 1000
       }
 
       cfg.conn_str = cfg.conn_str.replace(/#{([^}]*)}/g, (p) => {
diff --git a/lib/tedious/connection-pool.js b/lib/tedious/connection-pool.js
index 17c0d3a9..ab2431e2 100644
--- a/lib/tedious/connection-pool.js
+++ b/lib/tedious/connection-pool.js
@@ -7,6 +7,14 @@ const { IDS } = require('../utils')
 const shared = require('../shared')
 const ConnectionError = require('../error/connection-error')
 
+function firstDefined () {
+  for (let i = 0; i < arguments.length; i++) {
+    if (typeof arguments[i] !== 'undefined') {
+      return arguments[i]
+    }
+  }
+}
+
 class ConnectionPool extends BaseConnectionPool {
   _poolCreate () {
     return new shared.Promise((resolve, reject) => {
@@ -36,8 +44,8 @@ class ConnectionPool extends BaseConnectionPool {
 
       cfg.options.database = cfg.options.database || this.config.database
       cfg.options.port = cfg.options.port || this.config.port
-      cfg.options.connectTimeout = cfg.options.connectTimeout || this.config.connectionTimeout || this.config.timeout || 15000
-      cfg.options.requestTimeout = cfg.options.requestTimeout || this.config.requestTimeout || this.config.timeout || 15000
+      cfg.options.connectTimeout = firstDefined(cfg.options.connectTimeout, this.config.connectionTimeout, this.config.timeout, 15000)
+      cfg.options.requestTimeout = firstDefined(cfg.options.requestTimeout, this.config.requestTimeout, this.config.timeout, 15000)
       cfg.options.tdsVersion = cfg.options.tdsVersion || '7_4'
       cfg.options.rowCollectionOnDone = cfg.options.rowCollectionOnDone || false
       cfg.options.rowCollectionOnRequestCompletion = cfg.options.rowCollectionOnRequestCompletion || false