diff --git a/SwiftWebSocket.xcodeproj/project.pbxproj b/SwiftWebSocket.xcodeproj/project.pbxproj
index 1296090..122c681 100755
--- a/SwiftWebSocket.xcodeproj/project.pbxproj
+++ b/SwiftWebSocket.xcodeproj/project.pbxproj
@@ -507,6 +507,7 @@
 				PRODUCT_NAME = SwiftWebSocket;
 				SDKROOT = appletvos;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 3;
 				TVOS_DEPLOYMENT_TARGET = 9.1;
 			};
@@ -530,6 +531,7 @@
 				SDKROOT = appletvos;
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = 3;
 				TVOS_DEPLOYMENT_TARGET = 9.1;
 			};