diff --git a/src/di/DependencyManager.ts b/src/di/DependencyManager.ts
index 6c4e56e..3165ab6 100644
--- a/src/di/DependencyManager.ts
+++ b/src/di/DependencyManager.ts
@@ -7,13 +7,12 @@ type Registration = {
 /**
  * Lifecycle types:
  * - 'singleton': A single shared instance cached for the lifetime of the manager
- * - 'instance': A new instance created on each resolve (transient)
- * - 'service': A new instance created on each resolve (transient, alias for 'instance')
+ * - 'transient': A new instance created on each resolve (transient)
  */
-type Lifecycle = 'instance' | 'service' | 'singleton';
+type Lifecycle = 'transient' | 'singleton';
 
 export class DependencyManager {
-  private static readonly _supportedLifecycles: string[] = ['instance', 'service', 'singleton'];
+  private static readonly _supportedLifecycles: Lifecycle[] = ['transient', 'singleton'];
   private readonly _resolving: Set<string>;
   private readonly _registrations: Map<string, Registration>;
   private readonly _singletons: Map<string, unknown>;
@@ -32,7 +31,7 @@ export class DependencyManager {
    * @param lifecycle - Lifecycle of the instance ('singleton', 'instance', or 'service'). Default: 'singleton'
    * @throws Error if name is already registered or lifecycle is invalid
    */
-  public register(name: string, Class: new (...args: any[]) => any, dependencies: string[], lifecycle = 'singleton') {
+  public register(name: string, Class: new (...args: any[]) => any, dependencies: string[], lifecycle: Lifecycle = 'singleton') {
     if (this._registrations.has(name)) {
       throw new Error(`Error: [${name}] is already registered`);
     }
@@ -62,7 +61,7 @@ export class DependencyManager {
     }
 
     const registration = this._registrations.get(name);
-    const {Class, dependencies, lifecycle} = registration!;
+    const { Class, dependencies, lifecycle } = registration!;
 
     if (lifecycle === 'singleton' && this._singletons.has(name)) {
       console.debug(`↻ Using cached singleton [${name}]`);