diff --git a/Demos/Cube/Cube.xcodeproj/project.pbxproj b/Demos/Cube/Cube.xcodeproj/project.pbxproj
index eb85271..4fddc15 100644
--- a/Demos/Cube/Cube.xcodeproj/project.pbxproj
+++ b/Demos/Cube/Cube.xcodeproj/project.pbxproj
@@ -460,7 +460,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
-				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
+				CLANG_CXX_LANGUAGE_STANDARD = "c++17";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = NO;
@@ -493,7 +493,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
-				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
+				CLANG_CXX_LANGUAGE_STANDARD = "c++17";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = NO;
diff --git a/Docs/Whats_New.md b/Docs/Whats_New.md
index e13796b..46d1951 100644
--- a/Docs/Whats_New.md
+++ b/Docs/Whats_New.md
@@ -22,6 +22,8 @@
 	- `VK_KHR_imageless_framebuffer`
 - Make `vkGetPastPresentationTimingGOOGLE()` queuing behavior compliant with Vulkan spec.
 - Expose `vkGetIOSurfaceMVK()` and `vkUseIOSurfaceMVK()` without requiring _Objective-C_.
+- Default MoltenVK build using `C++17` and compiler optimization setting `-O2`.
+- API fix to remove `#include "SPIRVReflection.h"` from `SPIRVToMSLConverter.h` header.
 - Support _Xcode 12.5_ build settings, build warnings, and SDK change to availability of
   `[MTLDevice supportsBCTextureCompression]` on _Mac Catalyst_.
 - Improve cache hits when matching `SPIRVToMSLConversionConfiguration` structs to each other 
diff --git a/ExternalDependencies.xcodeproj/project.pbxproj b/ExternalDependencies.xcodeproj/project.pbxproj
index a7b5355..89f0e9f 100644
--- a/ExternalDependencies.xcodeproj/project.pbxproj
+++ b/ExternalDependencies.xcodeproj/project.pbxproj
@@ -5299,7 +5299,7 @@
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
 				BITCODE_GENERATION_MODE = marker;
-				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
+				CLANG_CXX_LANGUAGE_STANDARD = "c++17";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = NO;
 				CLANG_WARN_BOOL_CONVERSION = YES;
@@ -5347,7 +5347,7 @@
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
 				BITCODE_GENERATION_MODE = bitcode;
-				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
+				CLANG_CXX_LANGUAGE_STANDARD = "c++17";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = NO;
 				CLANG_WARN_BOOL_CONVERSION = YES;
diff --git a/MoltenVK/MoltenVK.xcodeproj/project.pbxproj b/MoltenVK/MoltenVK.xcodeproj/project.pbxproj
index 6a8c9ca..f216f58 100644
--- a/MoltenVK/MoltenVK.xcodeproj/project.pbxproj
+++ b/MoltenVK/MoltenVK.xcodeproj/project.pbxproj
@@ -1543,7 +1543,7 @@
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
 				BITCODE_GENERATION_MODE = marker;
-				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
+				CLANG_CXX_LANGUAGE_STANDARD = "c++17";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = NO;
 				CLANG_WARN_BOOL_CONVERSION = YES;
@@ -1612,7 +1612,7 @@
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
 				BITCODE_GENERATION_MODE = bitcode;
-				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
+				CLANG_CXX_LANGUAGE_STANDARD = "c++17";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = NO;
 				CLANG_WARN_BOOL_CONVERSION = YES;
diff --git a/MoltenVKShaderConverter/MoltenVKShaderConverter.xcodeproj/project.pbxproj b/MoltenVKShaderConverter/MoltenVKShaderConverter.xcodeproj/project.pbxproj
index dd6ac78..c3908de 100644
--- a/MoltenVKShaderConverter/MoltenVKShaderConverter.xcodeproj/project.pbxproj
+++ b/MoltenVKShaderConverter/MoltenVKShaderConverter.xcodeproj/project.pbxproj
@@ -587,7 +587,7 @@
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
 				BITCODE_GENERATION_MODE = marker;
-				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
+				CLANG_CXX_LANGUAGE_STANDARD = "c++17";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = NO;
 				CLANG_WARN_BOOL_CONVERSION = YES;
@@ -645,7 +645,7 @@
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
 				BITCODE_GENERATION_MODE = bitcode;
-				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
+				CLANG_CXX_LANGUAGE_STANDARD = "c++17";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = NO;
 				CLANG_WARN_BOOL_CONVERSION = YES;