diff --git a/Example/Example.xcodeproj/project.pbxproj b/Example/Example.xcodeproj/project.pbxproj
index c176588..06b2d75 100644
--- a/Example/Example.xcodeproj/project.pbxproj
+++ b/Example/Example.xcodeproj/project.pbxproj
@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 52;
+	objectVersion = 54;
 	objects = {
 
 /* Begin PBXBuildFile section */
@@ -137,8 +137,9 @@
 		49F4DD4526448849004E511B /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
+				BuildIndependentTargetsInParallel = YES;
 				LastSwiftUpdateCheck = 1240;
-				LastUpgradeCheck = 1240;
+				LastUpgradeCheck = 2700;
 				TargetAttributes = {
 					49F4DD4C26448849004E511B = {
 						CreatedOnToolsVersion = 12.4;
@@ -240,6 +241,7 @@
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				ENABLE_TESTABILITY = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
@@ -259,6 +261,7 @@
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
+				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 			};
@@ -301,6 +304,7 @@
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
@@ -313,6 +317,7 @@
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
 				SDKROOT = iphoneos;
+				STRING_CATALOG_GENERATE_SYMBOLS = YES;
 				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_OPTIMIZATION_LEVEL = "-O";
 				VALIDATE_PRODUCT = YES;
@@ -328,7 +333,7 @@
 				DEVELOPMENT_ASSET_PATHS = "\"Example/Preview Content\"";
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = Example/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
+				IPHONEOS_DEPLOYMENT_TARGET = "$(RECOMMENDED_IPHONEOS_DEPLOYMENT_TARGET)";
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -349,7 +354,7 @@
 				DEVELOPMENT_ASSET_PATHS = "\"Example/Preview Content\"";
 				ENABLE_PREVIEWS = YES;
 				INFOPLIST_FILE = Example/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
+				IPHONEOS_DEPLOYMENT_TARGET = "$(RECOMMENDED_IPHONEOS_DEPLOYMENT_TARGET)";
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
diff --git a/Example/Example.xcodeproj/xcshareddata/xcschemes/Example.xcscheme b/Example/Example.xcodeproj/xcshareddata/xcschemes/Example.xcscheme
index cc28b85..f65ad30 100644
--- a/Example/Example.xcodeproj/xcshareddata/xcschemes/Example.xcscheme
+++ b/Example/Example.xcodeproj/xcshareddata/xcschemes/Example.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1240"
+   LastUpgradeVersion = "2700"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/Sources/CohesionKit/Identifier.swift b/Sources/CohesionKit/Identifier.swift
index 9d36d63..15951c7 100644
--- a/Sources/CohesionKit/Identifier.swift
+++ b/Sources/CohesionKit/Identifier.swift
@@ -1,25 +1,19 @@
 /// a unique identifier to observe an object
-struct Identifier: Hashable, Sendable, ExpressibleByStringLiteral {
-  let identifier: String
+struct Identifier: Hashable {
+    private let objectType: ObjectIdentifier
+    private let key: AnyHashable
 
-  init(_ identifier: String) {
-    self.identifier = identifier
-  }
+    /// Generates an identifier for type T with key as key
+    init<T>(for type: T.Type, key: some Hashable) {
+        self.objectType = ObjectIdentifier(type)
+        self.key = AnyHashable(key)
+    }
 
-  init(stringLiteral value: StringLiteralType) {
-    self.init(value)
-  }
+    init<T: Identifiable>(for object: T) {
+        self.init(for: T.self, key: object.id)
+    }
 
-  /// Generates an identifier for type T with key as key
-  init<T>(for type: T.Type, key: Any) {
-    self.init("\(T.self):\(key)")
-  }
-
-  init<T: Identifiable>(for object: T) {
-    self.init(for: T.self, key: object.id)
-  }
-
-  init<T>(for type: T.Type, key: AliasKey<T>) {
-    self.init("alias:\(T.self):\(key.name)")
-  }
+    init<T>(for type: T.Type, key: AliasKey<T>) {
+        self.init(for: AliasContainer<T>.self, key: key.name)
+    }
 }