diff --git a/detox/ios/Detox.xcodeproj/project.pbxproj b/detox/ios/Detox.xcodeproj/project.pbxproj
index 396b2f9ac7..cb78c68f9d 100644
--- a/detox/ios/Detox.xcodeproj/project.pbxproj
+++ b/detox/ios/Detox.xcodeproj/project.pbxproj
@@ -560,6 +560,7 @@
 			developmentRegion = English;
 			hasScannedForEncodings = 0;
 			knownRegions = (
+				English,
 				en,
 			);
 			mainGroup = 3947678D1DBF985400D72256;
@@ -909,7 +910,7 @@
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Debug;
 		};
@@ -939,7 +940,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.wix.Detox;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 4.2;
 			};
 			name = Release;
 		};