diff --git a/Ditto.xcodeproj/project.pbxproj b/Ditto.xcodeproj/project.pbxproj
index 1636cf0..44149c7 100644
--- a/Ditto.xcodeproj/project.pbxproj
+++ b/Ditto.xcodeproj/project.pbxproj
@@ -158,7 +158,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0800;
-				LastUpgradeCheck = 0800;
+				LastUpgradeCheck = 0820;
 				ORGANIZATIONNAME = Kevin;
 				TargetAttributes = {
 					7681250E1D7EF01100856E0C = {
@@ -257,6 +257,7 @@
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_SUSPICIOUS_MOVES = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
@@ -310,6 +311,7 @@
 				CLANG_WARN_INFINITE_RECURSION = YES;
 				CLANG_WARN_INT_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
 				CLANG_WARN_SUSPICIOUS_MOVES = YES;
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
diff --git a/Ditto.xcodeproj/xcshareddata/xcschemes/Ditto.xcscheme b/Ditto.xcodeproj/xcshareddata/xcschemes/Ditto.xcscheme
index 0e74980..518fb3b 100644
--- a/Ditto.xcodeproj/xcshareddata/xcschemes/Ditto.xcscheme
+++ b/Ditto.xcodeproj/xcshareddata/xcschemes/Ditto.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "0800"
+   LastUpgradeVersion = "0820"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Ditto/ConvertibleTypes.swift b/Ditto/ConvertibleTypes.swift
index 8e24f53..ed63aab 100644
--- a/Ditto/ConvertibleTypes.swift
+++ b/Ditto/ConvertibleTypes.swift
@@ -111,7 +111,7 @@ private func convertAny(any: Any) -> JSONValue? {
 }
 
 private func convertSequence<T: Sequence>(sequence: T) -> [Any] {
-    var convertedArray = [Any?]()
+    var convertedArray = [Any]()
     for element in sequence {
         if let element = convertAny(any: element) {
             convertedArray.append(element)