diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4a4af68..efa47ff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## 0.1.1
 
+- **Add**: `acceptableStatusCodes` property in `DefaultNetworkService`.
+- **Add**: `retry(retryLimit:canRetryClosure:)` to `Observable` extension.
+- **Removed**: `retryWithinErrors` method from `Observable` extension.
 - **Update**: LeadKit to `0.6.x` version
 - **Removed**: `ConnectionError`. (Replaced by `LeadKit.RequestError`)
 - **Removed**: `handleConnectionErrors` from Observable+Extensions
diff --git a/LeadKitAdditions/Podfile.lock b/LeadKitAdditions/Podfile.lock
index fe4bf4e..4c2a1b4 100644
--- a/LeadKitAdditions/Podfile.lock
+++ b/LeadKitAdditions/Podfile.lock
@@ -6,9 +6,9 @@ PODS:
   - IDZSwiftCommonCrypto (0.10.0)
   - InputMask (3.0.0)
   - KeychainAccess (3.1.0)
-  - LeadKit (0.6.1):
-    - LeadKit/Core (= 0.6.1)
-  - LeadKit/Core (0.6.1):
+  - LeadKit (0.6.5):
+    - LeadKit/Core (= 0.6.5)
+  - LeadKit/Core (0.6.5):
     - CocoaLumberjack/Swift (~> 3.3.0)
     - ObjectMapper (~> 3.0.0)
     - RxAlamofire (= 4.0.0)
@@ -16,7 +16,7 @@ PODS:
     - RxSwift (= 4.0.0)
     - TableKit (~> 2.5.0)
     - UIScrollView-InfiniteScroll (~> 1.0.0)
-  - LeadKit/Core-iOS-Extension (0.6.1):
+  - LeadKit/Core-iOS-Extension (0.6.5):
     - CocoaLumberjack/Swift (~> 3.3.0)
     - ObjectMapper (~> 3.0.0)
     - RxAlamofire (= 4.0.0)
@@ -49,7 +49,7 @@ SPEC CHECKSUMS:
   IDZSwiftCommonCrypto: 4eef2c46e262dfbcbc1fd76365e066336680ad7d
   InputMask: 37c273bde6705187d80cf0b4240cb42ea92096c3
   KeychainAccess: 94c5540b32eabf7bc32bfb976a268e8ea05fd6da
-  LeadKit: 13d8e4d8f9484e9fd77b23da6f585eb67b1886c3
+  LeadKit: 583c724f25852e40eebad8af5a945e101c282fde
   ObjectMapper: 92230db59bf8f341a5c3a3cf0b9fbdde3cf0d87f
   RxAlamofire: 6ea579ac53bf14cb4bc7049a3866e5a769989b1d
   RxCocoa: d62846ca96495d862fa4c59ea7d87e5031d7340e
diff --git a/LeadKitAdditions/Sources/Extensions/Observable+Extensions.swift b/LeadKitAdditions/Sources/Extensions/Observable+Extensions.swift
index 363fa48..c6dbe09 100644
--- a/LeadKitAdditions/Sources/Extensions/Observable+Extensions.swift
+++ b/LeadKitAdditions/Sources/Extensions/Observable+Extensions.swift
@@ -29,23 +29,23 @@ public typealias VoidBlock = () -> Void
 
 public extension Observable {
 
-    /**
-     Allow to configure request to restart if error occured
-     
-      - parameters:
-        - errorTypes: list of error types, which triggers request restart
-        - retryLimit: how many times request can restarts
-     */
-    func retryWithinErrors(_ errorTypes: [Error.Type] = [RequestError.self],
-                           retryLimit: UInt = DefaultNetworkService.retryLimit)
-        -> Observable<Observable.E> {
+    /// A closure that checks for "retryable" error
+    typealias CanRetryClosure = (Error) -> Bool
+
+    /// Allow to configure request to restart if error occured
+    ///
+    /// - Parameters:
+    ///   - retryLimit: how many times request can restarts
+    ///   - canRetryClosure: a closure that checks for "retryable" error
+    /// - Returns: An observable sequence producing the elements of the given sequence repeatedly
+    /// until it terminates successfully or is notified to error or complete.
+    func retry(retryLimit: UInt = DefaultNetworkService.retryLimit,
+               canRetryClosure: @escaping CanRetryClosure) -> Observable<Observable.E> {
 
             return observeOn(CurrentThreadScheduler.instance)
-                .retryWhen { errors -> Observable<Observable.E> in
-                    return errors.enumerated().flatMap { attempt, error -> Observable<Observable.E> in
-                        let canRetry = errorTypes.contains { type(of: error) == $0 }
-
-                        return (canRetry && attempt < retryLimit - 1) ? self : .error(error)
+                .retryWhen { errorsObservable -> Observable<Observable.E> in
+                    return errorsObservable.enumerated().flatMap {
+                        (canRetryClosure($1) && $0 < retryLimit - 1) ? self : .error($1)
                     }
             }
     }
diff --git a/LeadKitAdditions/Sources/Services/Network/DefaultNetworkService.swift b/LeadKitAdditions/Sources/Services/Network/DefaultNetworkService.swift
index 64401ca..54d8c2f 100644
--- a/LeadKitAdditions/Sources/Services/Network/DefaultNetworkService.swift
+++ b/LeadKitAdditions/Sources/Services/Network/DefaultNetworkService.swift
@@ -43,8 +43,13 @@ open class DefaultNetworkService: NetworkService {
         return 20.0
     }
 
-    public override init(sessionManager: SessionManager) {
-        super.init(sessionManager: sessionManager)
+    /// The default acceptable range 200…299
+    open var acceptableStatusCodes: [Int] {
+        return Alamofire.SessionManager.defaultAcceptableStatusCodes
+    }
+
+    public init(sessionManager: SessionManager) {
+        super.init(sessionManager: sessionManager, acceptableStatusCodes: acceptableStatusCodes)
 
         // Fatal error: `drive*` family of methods can be only called from `MainThread`
         DispatchQueue.main.async {