diff --git a/ZipArchive.xcodeproj/project.pbxproj b/ZipArchive.xcodeproj/project.pbxproj
index 83778db..eece749 100644
--- a/ZipArchive.xcodeproj/project.pbxproj
+++ b/ZipArchive.xcodeproj/project.pbxproj
@@ -322,7 +322,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0730;
-				LastUpgradeCheck = 0710;
+				LastUpgradeCheck = 0820;
 				ORGANIZATIONNAME = smumryak;
 				TargetAttributes = {
 					AFF75A231C37279600F450AC = {
@@ -330,7 +330,7 @@
 					};
 					B423AE191C0DF76A0004A2F1 = {
 						CreatedOnToolsVersion = 7.1.1;
-						LastSwiftMigration = 0800;
+						LastSwiftMigration = 0820;
 					};
 				};
 			};
@@ -472,8 +472,10 @@
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
@@ -518,8 +520,10 @@
 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
 				CLANG_WARN_EMPTY_BODY = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = YES;
@@ -538,6 +542,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 9.1;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
+				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";
@@ -552,6 +557,7 @@
 				BITCODE_GENERATION_MODE = marker;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
@@ -575,6 +581,7 @@
 				BITCODE_GENERATION_MODE = bitcode;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
 				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
diff --git a/ZipArchive.xcodeproj/xcshareddata/xcschemes/ZipArchive-Mac.xcscheme b/ZipArchive.xcodeproj/xcshareddata/xcschemes/ZipArchive-Mac.xcscheme
index 8275f1a..12054f6 100644
--- a/ZipArchive.xcodeproj/xcshareddata/xcschemes/ZipArchive-Mac.xcscheme
+++ b/ZipArchive.xcodeproj/xcshareddata/xcschemes/ZipArchive-Mac.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0820"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/ZipArchive.xcodeproj/xcshareddata/xcschemes/ZipArchive-iOS.xcscheme b/ZipArchive.xcodeproj/xcshareddata/xcschemes/ZipArchive-iOS.xcscheme
index 6bbc8ef..6f25255 100644
--- a/ZipArchive.xcodeproj/xcshareddata/xcschemes/ZipArchive-iOS.xcscheme
+++ b/ZipArchive.xcodeproj/xcshareddata/xcschemes/ZipArchive-iOS.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0720"
+   LastUpgradeVersion = "0820"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"