diff --git a/Chargebee/Classes/Configuration/CBEnvironment.swift b/Chargebee/Classes/Configuration/CBEnvironment.swift
index ca1eaf5..cec6001 100644
--- a/Chargebee/Classes/Configuration/CBEnvironment.swift
+++ b/Chargebee/Classes/Configuration/CBEnvironment.swift
@@ -6,18 +6,18 @@ import Foundation
 
 class CBEnvironment {
     static var site: String = ""
-    static var publishableApiKey: String = ""
+    static var apiKey: String = ""
     static var encodedApiKey: String = ""
     static var baseUrl: String = ""
     static var allowErrorLogging: Bool = true
     static var sdkKey : String = ""
     static var version : CatalogVersion = .unknown
 
-    static func configure(site: String, publishableApiKey: String, allowErrorLogging: Bool, sdkKey: String? = nil) {
+    static func configure(site: String, apiKey: String, allowErrorLogging: Bool, sdkKey: String? = nil) {
         CBEnvironment.site = site
-        CBEnvironment.publishableApiKey = publishableApiKey
+        CBEnvironment.apiKey = apiKey
         CBEnvironment.allowErrorLogging = allowErrorLogging
-        CBEnvironment.encodedApiKey = CBEnvironment.publishableApiKey.data(using: .utf8)?.base64EncodedString() ?? ""
+        CBEnvironment.encodedApiKey = CBEnvironment.apiKey.data(using: .utf8)?.base64EncodedString() ?? ""
         CBEnvironment.baseUrl = "https://\(CBEnvironment.site).chargebee.com/api"
         CBEnvironment.version = .unknown
 
diff --git a/Chargebee/Classes/Configuration/Chargebee.swift b/Chargebee/Classes/Configuration/Chargebee.swift
index 7c02e7a..b36149f 100644
--- a/Chargebee/Classes/Configuration/Chargebee.swift
+++ b/Chargebee/Classes/Configuration/Chargebee.swift
@@ -9,7 +9,7 @@ public class Chargebee {
     public init() {
     }
 
-    public static func configure(site: String, publishableApiKey: String, sdkKey: String? = nil, allowErrorLogging: Bool = true) {
-        CBEnvironment.configure(site: site, publishableApiKey: publishableApiKey, allowErrorLogging: allowErrorLogging, sdkKey: sdkKey)
+    public static func configure(site: String, apiKey: String, sdkKey: String? = nil, allowErrorLogging: Bool = true) {
+        CBEnvironment.configure(site: site, apiKey: apiKey, allowErrorLogging: allowErrorLogging, sdkKey: sdkKey)
     }
 }
diff --git a/Chargebee/Classes/Token/CBPaymentConfigResource.swift b/Chargebee/Classes/Token/CBPaymentConfigResource.swift
index 465d4d3..3a5e8a6 100644
--- a/Chargebee/Classes/Token/CBPaymentConfigResource.swift
+++ b/Chargebee/Classes/Token/CBPaymentConfigResource.swift
@@ -11,7 +11,7 @@ final class CBPaymentConfigResource: CBAPIResource {
     var baseUrl: String
     var authHeader: String? {
         get {
-            "Basic \(CBEnvironment.publishableApiKey)"
+            "Basic \(CBEnvironment.apiKey)"
         }
     }
     var methodPath: String = "/internal/component/retrieve_config"
diff --git a/Example/Chargebee/AppDelegate.swift b/Example/Chargebee/AppDelegate.swift
index 01087d7..4926b9e 100644
--- a/Example/Chargebee/AppDelegate.swift
+++ b/Example/Chargebee/AppDelegate.swift
@@ -19,7 +19,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         // Override point for customization after application
         
         Chargebee.configure(site: "Site Name",
-                            publishableApiKey: "API Key",sdkKey: "ResourceID/SDK Key")
+                            apiKey: "API Key- (full Access)",sdkKey: "ResourceID/SDK Key")
        return true
     }
 }
diff --git a/Example/Chargebee/CBSDKConfigurationViewController.swift b/Example/Chargebee/CBSDKConfigurationViewController.swift
index fca1fca..af45fbc 100644
--- a/Example/Chargebee/CBSDKConfigurationViewController.swift
+++ b/Example/Chargebee/CBSDKConfigurationViewController.swift
@@ -44,7 +44,7 @@ final class CBSDKConfigurationViewController: UIViewController {
     @IBAction private func initializeClicked(_ sender: UIButton) {
 //        guard canInitialise() else { return }
         Chargebee.configure(site: siteNameTextField.unwrappedText,
-                            publishableApiKey: apiKeyTextField.unwrappedText,
+                            apiKey: apiKeyTextField.unwrappedText,
                             sdkKey: sdkKeyTextField.unwrappedText,
                             allowErrorLogging: true)
         }
diff --git a/README.md b/README.md
index 95bbac2..e3f8d87 100644
--- a/README.md
+++ b/README.md
@@ -40,19 +40,19 @@ You can initialize the SDK during your app startup by including the following in
 import Chargebee
 
 Chargebee.configure(site: "your-site",
-                    publishableApiKey: "api_key",
+                    apiKey: "api_key",
                     sdkKey: "sdk_key")
 }
 
 ```
 
 ### Configuration for using tokenization only
-If you want to use the Chargebee iOS SDK only for tokenizing credit card details, you can initialize the SDK with your Chargebee Site and Publishable API key alone. You can initialize the SDK during your app startup by including the following in your app delegate.
+If you want to use the Chargebee iOS SDK only for tokenizing credit card details, you can initialize the SDK with your Chargebee Site and  API key alone. You can initialize the SDK during your app startup by including the following in your app delegate.
 
 ```swift
 import Chargebee
 
-Chargebee.configure(site: "your-site", publishableApiKey: "api_key")
+Chargebee.configure(site: "your-site", apiKey: "api_key")
 
 ```