diff --git a/ExecutorKit.xcodeproj/project.pbxproj b/ExecutorKit.xcodeproj/project.pbxproj
index c2b3333..55c4357 100644
--- a/ExecutorKit.xcodeproj/project.pbxproj
+++ b/ExecutorKit.xcodeproj/project.pbxproj
@@ -147,10 +147,10 @@
 				LastUpgradeCheck = 9999;
 				TargetAttributes = {
 					OBJ_19 = {
-						LastSwiftMigration = 1010;
+						LastSwiftMigration = 1020;
 					};
 					OBJ_29 = {
-						LastSwiftMigration = 1010;
+						LastSwiftMigration = 1020;
 					};
 				};
 			};
@@ -159,6 +159,7 @@
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 			);
 			mainGroup = OBJ_5;
@@ -214,7 +215,7 @@
 				PRODUCT_MODULE_NAME = "$(TARGET_NAME:c99extidentifier)";
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				TARGET_NAME = ExecutorKit;
 			};
 			name = Debug;
@@ -238,7 +239,7 @@
 				PRODUCT_MODULE_NAME = "$(TARGET_NAME:c99extidentifier)";
 				PRODUCT_NAME = "$(TARGET_NAME:c99extidentifier)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				TARGET_NAME = ExecutorKit;
 			};
 			name = Release;
@@ -284,7 +285,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "@loader_path/../Frameworks";
 				OTHER_LDFLAGS = "$(inherited)";
 				OTHER_SWIFT_FLAGS = "$(inherited)";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				TARGET_NAME = "swift-executorTests";
 			};
 			name = Debug;
@@ -303,7 +304,7 @@
 				LD_RUNPATH_SEARCH_PATHS = "@loader_path/../Frameworks";
 				OTHER_LDFLAGS = "$(inherited)";
 				OTHER_SWIFT_FLAGS = "$(inherited)";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 				TARGET_NAME = "swift-executorTests";
 			};
 			name = Release;
diff --git a/swift-executor.podspec b/swift-executor.podspec
index 2aeb7dc..df26f40 100644
--- a/swift-executor.podspec
+++ b/swift-executor.podspec
@@ -16,7 +16,7 @@ Pod::Spec.new do |s|
   #
 
   s.name         = "swift-executor"
-  s.version      = "1.8.6"
+  s.version      = "1.9.0"
   s.summary      = "A lightweight simple implementation of Foundation's Concurrent Operation"
 
   # This description is used to generate tags and improve search results.
@@ -90,6 +90,7 @@ Pod::Spec.new do |s|
   #
 
   s.source_files  = "Sources"
+  s.swift_version = "5.0"
   #s.exclude_files = "Classes/Exclude"
 
   # s.public_header_files = "Classes/**/*.h"