diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 16f83823..255e3433 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -2,6 +2,7 @@ v8.0.0 (2021-??-??)
 -------------------
 [change] Updated to latest Tedious 14 ((#1318)[https://github.com/tediousjs/node-mssql/pull/1318])
 [change] Errors for bad bulk load parameters have slightly different error messages ((#1318)[https://github.com/tediousjs/node-mssql/pull/1318])
+[change] Options provided to the driver via the config.options object will not be overridden with other values if set explicitly ((#1340)[https://github.com/tediousjs/node-mssql/pull/1340])
 
 v7.2.1 (2021-08-19)
 -------------------
diff --git a/lib/tedious/connection-pool.js b/lib/tedious/connection-pool.js
index 06d40e2e..7b6d4255 100644
--- a/lib/tedious/connection-pool.js
+++ b/lib/tedious/connection-pool.js
@@ -34,24 +34,23 @@ class ConnectionPool extends BaseConnectionPool {
         }, this.config.authentication)
       }
 
-      cfg.options.database = this.config.database
-      cfg.options.port = this.config.port
-      cfg.options.connectTimeout = this.config.connectionTimeout || this.config.timeout || 15000
-      cfg.options.requestTimeout = this.config.requestTimeout != null ? this.config.requestTimeout : 15000
+      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 != null ? this.config.requestTimeout : 15000
       cfg.options.tdsVersion = cfg.options.tdsVersion || '7_4'
-      cfg.options.rowCollectionOnDone = false
-      cfg.options.rowCollectionOnRequestCompletion = false
-      cfg.options.useColumnNames = false
+      cfg.options.rowCollectionOnDone = cfg.options.rowCollectionOnDone || false
+      cfg.options.rowCollectionOnRequestCompletion = cfg.options.rowCollectionOnRequestCompletion || false
+      cfg.options.useColumnNames = cfg.options.useColumnNames || false
       cfg.options.appName = cfg.options.appName || 'node-mssql'
 
       // tedious always connect via tcp when port is specified
       if (cfg.options.instanceName) delete cfg.options.port
 
       if (isNaN(cfg.options.requestTimeout)) cfg.options.requestTimeout = 15000
-      if (cfg.options.requestTimeout === Infinity) cfg.options.requestTimeout = 0
-      if (cfg.options.requestTimeout < 0) cfg.options.requestTimeout = 0
+      if (cfg.options.requestTimeout === Infinity || cfg.options.requestTimeout < 0) cfg.options.requestTimeout = 0
 
-      if (this.config.debug) {
+      if (!cfg.options.debug && this.config.debug) {
         cfg.options.debug = {
           packet: true,
           token: true,