diff --git a/src/structures/listener.ts b/src/structures/listener.ts
index 772e564..0fbc821 100644
--- a/src/structures/listener.ts
+++ b/src/structures/listener.ts
@@ -1,11 +1,11 @@
-process.on('unhandledRejection', (error) => {
+process.on('unhandledRejection', (error: Error): void => {
     console.error('Unhandled Promise Rejection:', error);
 });
 
-process.on('uncaughtException', (error) => {
+process.on('uncaughtException', (error: Error): void => {
     console.error('uncaughtException:', error);
 });
 
-process.on('uncaughtExceptionMonitor', (error) => {
+process.on('uncaughtExceptionMonitor', (error: Error): void => {
     console.error('uncaughtExceptionMonitor:', error);
 });