diff --git a/Example/Elissa.xcodeproj/project.pbxproj b/Example/Elissa.xcodeproj/project.pbxproj
index 1b4c7f9..6d96809 100644
--- a/Example/Elissa.xcodeproj/project.pbxproj
+++ b/Example/Elissa.xcodeproj/project.pbxproj
@@ -454,6 +454,7 @@
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -493,6 +494,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_VERSION = 4.0;
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;