diff --git a/Sodes/Sodes.xcodeproj/project.pbxproj b/Sodes/Sodes.xcodeproj/project.pbxproj
index 00a9a73..8541143 100644
--- a/Sodes/Sodes.xcodeproj/project.pbxproj
+++ b/Sodes/Sodes.xcodeproj/project.pbxproj
@@ -515,7 +515,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0800;
-				LastUpgradeCheck = 1020;
+				LastUpgradeCheck = 1200;
 				TargetAttributes = {
 					4731BAF11D5534ED00FCF41B = {
 						CreatedOnToolsVersion = 8.0;
@@ -803,7 +803,6 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				INFOPLIST_FILE = SodesAudioTests/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = com.niceboy.SodesAudioTests;
@@ -835,7 +834,6 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				INFOPLIST_FILE = SodesAudioTests/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = NO;
 				PRODUCT_BUNDLE_IDENTIFIER = com.niceboy.SodesAudioTests;
@@ -897,7 +895,6 @@
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				INFOPLIST_FILE = SodesAudio/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 9.1;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
@@ -958,7 +955,6 @@
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				INFOPLIST_FILE = SodesAudio/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 9.1;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = NO;
 				OTHER_SWIFT_FLAGS = "";
@@ -1005,7 +1001,6 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				INFOPLIST_FILE = SodesExample/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = com.niceboy.SodesExample;
@@ -1042,7 +1037,6 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				INFOPLIST_FILE = SodesExample/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = NO;
 				PRODUCT_BUNDLE_IDENTIFIER = com.niceboy.SodesExample;
@@ -1070,6 +1064,7 @@
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -1084,6 +1079,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				ONLY_ACTIVE_ARCH = YES;
 			};
 			name = Debug;
@@ -1104,6 +1100,7 @@
 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -1117,6 +1114,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
 			};
 			name = Release;
@@ -1154,7 +1152,6 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				INFOPLIST_FILE = SodesFoundation/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 9.1;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = com.niceboy.SodesFoundation;
@@ -1198,7 +1195,6 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				INFOPLIST_FILE = SodesFoundation/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 9.1;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = NO;
 				PRODUCT_BUNDLE_IDENTIFIER = com.niceboy.SodesFoundation;
@@ -1239,7 +1235,6 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				INFOPLIST_FILE = SodesFoundationTests/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = com.niceboy.SodesFoundationTests;
@@ -1271,7 +1266,6 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				INFOPLIST_FILE = SodesFoundationTests/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = NO;
 				PRODUCT_BUNDLE_IDENTIFIER = com.niceboy.SodesFoundationTests;
@@ -1316,7 +1310,6 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				INFOPLIST_FILE = SwiftableFileHandle/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 9.1;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = com.niceboy.SwiftableFileHandle;
@@ -1357,7 +1350,6 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				INFOPLIST_FILE = SwiftableFileHandle/Info.plist;
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
-				IPHONEOS_DEPLOYMENT_TARGET = 9.1;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MTL_ENABLE_DEBUG_INFO = NO;
 				PRODUCT_BUNDLE_IDENTIFIER = com.niceboy.SwiftableFileHandle;
diff --git a/Sodes/Sodes.xcodeproj/xcshareddata/xcschemes/SodesAudio.xcscheme b/Sodes/Sodes.xcodeproj/xcshareddata/xcschemes/SodesAudio.xcscheme
index 5e51098..b8f259d 100644
--- a/Sodes/Sodes.xcodeproj/xcshareddata/xcschemes/SodesAudio.xcscheme
+++ b/Sodes/Sodes.xcodeproj/xcshareddata/xcschemes/SodesAudio.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1020"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -41,6 +41,15 @@
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "473AB2041D3275B4000B15FF"
+            BuildableName = "SodesAudio.framework"
+            BlueprintName = "SodesAudio"
+            ReferencedContainer = "container:Sodes.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
       <Testables>
          <TestableReference
             skipped = "NO">
@@ -53,17 +62,6 @@
             </BuildableReference>
          </TestableReference>
       </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "473AB2041D3275B4000B15FF"
-            BuildableName = "SodesAudio.framework"
-            BlueprintName = "SodesAudio"
-            ReferencedContainer = "container:Sodes.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -84,8 +82,6 @@
             ReferencedContainer = "container:Sodes.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"
diff --git a/Sodes/Sodes.xcodeproj/xcshareddata/xcschemes/SodesFoundation.xcscheme b/Sodes/Sodes.xcodeproj/xcshareddata/xcschemes/SodesFoundation.xcscheme
index a3dd39f..b17da6d 100644
--- a/Sodes/Sodes.xcodeproj/xcshareddata/xcschemes/SodesFoundation.xcscheme
+++ b/Sodes/Sodes.xcodeproj/xcshareddata/xcschemes/SodesFoundation.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1020"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -41,6 +41,15 @@
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "47AAD59A1D55874D0025A72C"
+            BuildableName = "SodesFoundation.framework"
+            BlueprintName = "SodesFoundation"
+            ReferencedContainer = "container:Sodes.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
       <Testables>
          <TestableReference
             skipped = "NO">
@@ -53,17 +62,6 @@
             </BuildableReference>
          </TestableReference>
       </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "47AAD59A1D55874D0025A72C"
-            BuildableName = "SodesFoundation.framework"
-            BlueprintName = "SodesFoundation"
-            ReferencedContainer = "container:Sodes.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -84,8 +82,6 @@
             ReferencedContainer = "container:Sodes.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"
diff --git a/Sodes/Sodes.xcodeproj/xcshareddata/xcschemes/SwiftableFileHandle.xcscheme b/Sodes/Sodes.xcodeproj/xcshareddata/xcschemes/SwiftableFileHandle.xcscheme
index 10a7935..375dc53 100644
--- a/Sodes/Sodes.xcodeproj/xcshareddata/xcschemes/SwiftableFileHandle.xcscheme
+++ b/Sodes/Sodes.xcodeproj/xcshareddata/xcschemes/SwiftableFileHandle.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1020"
+   LastUpgradeVersion = "1200"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -29,8 +29,6 @@
       shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
       </Testables>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -51,8 +49,6 @@
             ReferencedContainer = "container:Sodes.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"
diff --git a/Sodes/SodesAudio/ResourceLoaderDelegate.swift b/Sodes/SodesAudio/ResourceLoaderDelegate.swift
index 8062006..fdd167b 100755
--- a/Sodes/SodesAudio/ResourceLoaderDelegate.swift
+++ b/Sodes/SodesAudio/ResourceLoaderDelegate.swift
@@ -10,6 +10,7 @@ import Foundation
 import AVFoundation
 import SodesFoundation
 import SwiftableFileHandle
+// TODO: replace with https://developer.apple.com/documentation/cryptokit
 import CryptoSwift
 
 protocol ResourceLoaderDelegateDelegate: class {