diff --git a/src/handler/events/observableHandling.ts b/src/handler/events/observableHandling.ts
index 0967390..04112f5 100644
--- a/src/handler/events/observableHandling.ts
+++ b/src/handler/events/observableHandling.ts
@@ -48,9 +48,9 @@ export function ignoreNonBot(prefix: string) {
  * If the current value in Result stream is an error, calls callback.
  * @param cb
  */
-export function errTap(cb: (err: SernError) => void) {
-    return (src: Observable<Result<{ mod: Module; absPath: string }, SernError>>) =>
-        new Observable<{ mod: Module; absPath: string }>(subscriber => {
+export function errTap<T extends Module>(cb: (err: SernError) => void) {
+    return (src: Observable<Result<{ mod: T; absPath: string }, SernError>>) =>
+        new Observable<{ mod: T; absPath: string }>(subscriber => {
             return src.subscribe({
                 next(value) {
                     if (value.err) {
diff --git a/src/handler/structures/wrapper.ts b/src/handler/structures/wrapper.ts
index c110dff..ff13ded 100644
--- a/src/handler/structures/wrapper.ts
+++ b/src/handler/structures/wrapper.ts
@@ -1,6 +1,7 @@
 import type { Client } from 'discord.js';
 import type { DiscordEvent, EventEmitterRegister, SernEvent } from '../../types/handler';
 import type SernEmitter from '../sernEmitter';
+import type { EventModule } from './module';
 
 /**
  * An object to be passed into Sern.Handler constructor.
@@ -16,10 +17,7 @@ interface Wrapper {
     readonly sernEmitter?: SernEmitter;
     readonly defaultPrefix?: string;
     readonly commands: string;
-    readonly events?:
-        | (DiscordEvent | EventEmitterRegister | SernEvent)[]
-        | string
-        | (() => (DiscordEvent | EventEmitterRegister | SernEvent)[]);
+    readonly events?: EventModule[] | string | (() => EventModule[]);
 }
 
 export default Wrapper;
diff --git a/src/handler/utilities/predicates.ts b/src/handler/utilities/predicates.ts
index a51a10f..48280e0 100644
--- a/src/handler/utilities/predicates.ts
+++ b/src/handler/utilities/predicates.ts
@@ -9,7 +9,7 @@ import type {
     SelectMenuInteraction,
     UserContextMenuCommandInteraction,
 } from 'discord.js';
-import type { DiscordEvent, EventEmitterRegister, SernEvent } from '../..';
+import type { DiscordEventCommand, SernEventCommand } from '../structures/events';
 import { CommandType } from '../..';
 
 export function correctModuleType<T extends keyof ModuleDefs>(
@@ -50,12 +50,10 @@ export function isPromise<T>(promiseLike: Awaitable<T>): promiseLike is Promise<
     return keys.has('then') && keys.has('catch');
 }
 
-export function isDiscordEvent(
-    el: DiscordEvent | EventEmitterRegister | SernEvent,
-): el is DiscordEvent {
-    return el.length === 2 && !['module.register', 'module.activates'].includes(el[0]);
+export function isDiscordEvent(el: EventModule): el is DiscordEventCommand {
+    return el.type === CommandType.Discord;
 }
-export function isSernEvent(el: DiscordEvent | EventEmitterRegister | SernEvent): el is SernEvent {
+export function isSernEvent(el: EventModule): el is SernEventCommand {
     return !isDiscordEvent(el);
 }
 
diff --git a/src/handler/utilities/readFile.ts b/src/handler/utilities/readFile.ts
index 74bbd22..0de41a1 100644
--- a/src/handler/utilities/readFile.ts
+++ b/src/handler/utilities/readFile.ts
@@ -54,7 +54,7 @@ export function buildData<T>(commandDir: string): Observable<
             mod: T;
             absPath: string;
         },
-        SernError.UndefinedModule
+        SernError
     >
 > {
     return from(
@@ -63,7 +63,7 @@ export function buildData<T>(commandDir: string): Observable<
             const mod = <T | undefined>require(absPath).default;
             if (mod !== undefined) {
                 return Ok({ mod, absPath });
-            } else return Err(SernError.UndefinedModule as const);
+            } else return Err(SernError.UndefinedModule);
         }),
     );
 }