diff --git a/TravelKit.podspec b/TravelKit.podspec
index 2ab1a44..fd2485b 100644
--- a/TravelKit.podspec
+++ b/TravelKit.podspec
@@ -1,11 +1,11 @@
 Pod::Spec.new do |spec|
   spec.name         = 'TravelKit'
-  spec.version      = '2.0.2'
+  spec.version      = '2.0.3'
   spec.license      = 'MIT'
   spec.homepage     = 'https://github.com/sygic-travel/apple-sdk'
   spec.authors      = 'Tripomatic s.r.o.', 'Michal Zelinka'
   spec.summary      = 'Travel SDK for travelling projects'
-  spec.source       = { :http => 'https://github.com/sygic-travel/apple-sdk/releases/download/v2.0.2/TravelKit-2.0.2-iOS.zip' }
+  spec.source       = { :http => 'https://github.com/sygic-travel/apple-sdk/releases/download/v2.0.3/TravelKit-2.0.3-iOS.zip' }
   spec.documentation_url = 'http://docs.sygictravelapi.com/apple-sdk/latest'
   spec.module_name  = 'TravelKit'
 
diff --git a/TravelKit.xcodeproj/project.pbxproj b/TravelKit.xcodeproj/project.pbxproj
index c142553..9851d96 100644
--- a/TravelKit.xcodeproj/project.pbxproj
+++ b/TravelKit.xcodeproj/project.pbxproj
@@ -1252,8 +1252,8 @@
 				STRIP_INSTALLED_PRODUCT = NO;
 				STRIP_SWIFT_SYMBOLS = NO;
 				TARGETED_DEVICE_FAMILY = "1,2";
-				TK_BUNDLE_BUILD = 237;
-				TK_BUNDLE_VERSION = 2.0.2;
+				TK_BUNDLE_BUILD = 238;
+				TK_BUNDLE_VERSION = 2.0.3;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -1340,8 +1340,8 @@
 				RUN_CLANG_STATIC_ANALYZER = YES;
 				SKIP_INSTALL = YES;
 				TARGETED_DEVICE_FAMILY = "1,2";
-				TK_BUNDLE_BUILD = 237;
-				TK_BUNDLE_VERSION = 2.0.2;
+				TK_BUNDLE_BUILD = 238;
+				TK_BUNDLE_VERSION = 2.0.3;
 				TVOS_DEPLOYMENT_TARGET = 9.0;
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";
diff --git a/TravelKit/TKSessionManager.m b/TravelKit/TKSessionManager.m
index 5f903b0..61c60ec 100644
--- a/TravelKit/TKSessionManager.m
+++ b/TravelKit/TKSessionManager.m
@@ -6,6 +6,8 @@
 //  Copyright © 2017 Tripomatic. All rights reserved.
 //
 
+#import <pthread/pthread.h>
+
 #import "TKSessionManager+Private.h"
 #import "TKDatabaseManager+Private.h"
 #import "TKEventsManager+Private.h"
@@ -49,13 +51,13 @@ - (instancetype)init
 	{
 		__weak typeof(self) weakSelf = self;
 
+		_database = [TKDatabaseManager sharedManager];
+		_events = [TKEventsManager sharedManager];
+
 		_events.sessionExpirationHandler = ^{
 			[weakSelf refreshSession];
 		};
 
-		_database = [TKDatabaseManager sharedManager];
-		_events = [TKEventsManager sharedManager];
-
 		NSString *suiteName = @"com.tripomatic.travelkit";
 
 		NSString *bundleID = [[NSBundle mainBundle] bundleIdentifier];
@@ -73,7 +75,9 @@ - (instancetype)init
 
 		[self loadState];
 
-		[self checkSession];
+		[[NSOperationQueue mainQueue] addOperationWithBlock:^{
+			[self checkSession];
+		}];
 	}
 
 	return self;
@@ -182,6 +186,11 @@ - (void)checkSession
 
 - (void)refreshSession
 {
+	static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+
+	if (pthread_mutex_trylock(&lock) != EXIT_SUCCESS)
+		return;
+
 	NSString *token = _session.refreshToken;
 
 	if (!token) return;
@@ -189,6 +198,7 @@ - (void)refreshSession
 	[[TKSSOAPI sharedAPI] performSessionRefreshWithToken:token success:^(TKSession *session) {
 
 		self.session = session;
+		pthread_mutex_unlock(&lock);
 
 	} failure:^(TKAPIError *error) {
 
@@ -196,6 +206,8 @@ - (void)refreshSession
 		if (error.code / 100 == 4)
 			self.session = nil;
 
+		pthread_mutex_unlock(&lock);
+
 	}];
 }