diff --git a/Realm.xcodeproj/project.pbxproj b/Realm.xcodeproj/project.pbxproj
index 5e57756a7a..fe08666943 100644
--- a/Realm.xcodeproj/project.pbxproj
+++ b/Realm.xcodeproj/project.pbxproj
@@ -2504,7 +2504,7 @@
 				DEFINES_MODULE = YES;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 2.3;
 			};
 			name = Debug;
 		};
@@ -2515,7 +2515,7 @@
 				CLANG_ENABLE_MODULES = YES;
 				DEFINES_MODULE = YES;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
-				SWIFT_VERSION = 3.0;
+				SWIFT_VERSION = 2.3;
 			};
 			name = Release;
 		};
@@ -2553,6 +2553,7 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 5D659E741BE03E0D006515A0 /* Realm iOS static.xcconfig */;
 			buildSettings = {
+				SWIFT_VERSION = 2.3;
 			};
 			name = Debug;
 		};
@@ -2560,6 +2561,7 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 5D659E741BE03E0D006515A0 /* Realm iOS static.xcconfig */;
 			buildSettings = {
+				SWIFT_VERSION = 2.3;
 			};
 			name = Release;
 		};