diff --git a/Podfile.lock b/Podfile.lock
index 0b7847d..56be53b 100644
--- a/Podfile.lock
+++ b/Podfile.lock
@@ -1,6 +1,6 @@
 PODS:
   - FunctionalSwift (1.0.5)
-  - YandexMoneyCoreApi (1.1.0):
+  - YandexMoneyCoreApi (1.2.0):
     - FunctionalSwift (~> 1.0.5)
 
 DEPENDENCIES:
@@ -12,7 +12,7 @@ EXTERNAL SOURCES:
 
 SPEC CHECKSUMS:
   FunctionalSwift: 89cef31016cbc9fcdd49ec04e5831ed5f51244bb
-  YandexMoneyCoreApi: 9e24781e7b523ce818e8754ed79c4bd8bab20a83
+  YandexMoneyCoreApi: 998d30de040fd32767840d760ca35b8d41dfb28f
 
 PODFILE CHECKSUM: 6e7c5c48060c013a57828b8bdba56efae76bd68f
 
diff --git a/YandexMoneyCoreApi.podspec b/YandexMoneyCoreApi.podspec
index 192fc0d..fb41638 100644
--- a/YandexMoneyCoreApi.podspec
+++ b/YandexMoneyCoreApi.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |spec|
   spec.name         = 'YandexMoneyCoreApi'
-  spec.version      = '1.1.0'
+  spec.version      = '1.2.0'
   spec.homepage     = 'https://github.com/yandex-money/core-api-swift'
   spec.license = { 
     :type => "MIT", 
diff --git a/YandexMoneyCoreApi/Core/ApiSession.swift b/YandexMoneyCoreApi/Core/ApiSession.swift
index 559078b..8212edb 100644
--- a/YandexMoneyCoreApi/Core/ApiSession.swift
+++ b/YandexMoneyCoreApi/Core/ApiSession.swift
@@ -29,13 +29,13 @@ public class ApiSession {
 
     /// Overrides all behavior for NSURLSessionTaskDelegate method
     /// `URLSession:task:didReceiveChallenge:completionHandler:` and requires the caller to call the `completionHandler`
-    public var taskDidReceiveChallengeWithCompletion: ((_ session: URLSession,
-                                                        _ challenge: URLAuthenticationChallenge,
-                                                        _ completionHandler: (URLSession.AuthChallengeDisposition,
-                                                                              URLCredential?) -> Void) -> Void)? {
-        didSet {
-            delegate.taskDidReceiveChallengeWithCompletion = taskDidReceiveChallengeWithCompletion
-        }
+    public var taskDidReceiveChallengeWithCompletion: ((
+        _ session: URLSession,
+        _ challenge: URLAuthenticationChallenge,
+        _ completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) -> Void)? {
+            didSet {
+                delegate.taskDidReceiveChallengeWithCompletion = taskDidReceiveChallengeWithCompletion
+            }
     }
 
     // MARK: - Private properties