diff --git a/OrderedDictionary.xcodeproj/project.pbxproj b/OrderedDictionary.xcodeproj/project.pbxproj
index 3c84b32..c9f5e49 100644
--- a/OrderedDictionary.xcodeproj/project.pbxproj
+++ b/OrderedDictionary.xcodeproj/project.pbxproj
@@ -609,7 +609,7 @@
 				INFOPLIST_FILE = "Supporting Files/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/Frameworks";
-				MARKETING_VERSION = 3.0.1;
+				MARKETING_VERSION = 4.0.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.lukaskubanek.OrderedDictionary;
 				PRODUCT_NAME = OrderedDictionary;
 				SKIP_INSTALL = YES;
@@ -631,7 +631,7 @@
 				INFOPLIST_FILE = "Supporting Files/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/Frameworks";
-				MARKETING_VERSION = 3.0.1;
+				MARKETING_VERSION = 4.0.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.lukaskubanek.OrderedDictionary;
 				PRODUCT_NAME = OrderedDictionary;
 				SKIP_INSTALL = YES;
@@ -678,7 +678,7 @@
 				INFOPLIST_FILE = "Supporting Files/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				MARKETING_VERSION = 3.0.1;
+				MARKETING_VERSION = 4.0.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.lukaskubanek.OrderedDictionary;
 				PRODUCT_NAME = OrderedDictionary;
 				SDKROOT = iphoneos;
@@ -701,7 +701,7 @@
 				INFOPLIST_FILE = "Supporting Files/Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				MARKETING_VERSION = 3.0.1;
+				MARKETING_VERSION = 4.0.0;
 				PRODUCT_BUNDLE_IDENTIFIER = com.lukaskubanek.OrderedDictionary;
 				PRODUCT_NAME = OrderedDictionary;
 				SDKROOT = iphoneos;