diff --git a/backend/mpc-system/pkg/logger/logger.go b/backend/mpc-system/pkg/logger/logger.go
index cbcb8402..eea1adee 100644
--- a/backend/mpc-system/pkg/logger/logger.go
+++ b/backend/mpc-system/pkg/logger/logger.go
@@ -1,8 +1,6 @@
 package logger
 
 import (
-	"os"
-
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 )
@@ -70,6 +68,10 @@ func Init(cfg *Config) error {
 	}
 
 	Sugar = Log.Sugar()
+
+	// Replace global zap logger to ensure our config takes effect
+	zap.ReplaceGlobals(Log)
+
 	return nil
 }
 
@@ -158,12 +160,14 @@ func Err(err error) zap.Field {
 	return zap.Error(err)
 }
 
-func init() {
-	// Initialize with development logger by default
-	// This will be overridden when Init() is called with proper config
-	if os.Getenv("ENV") == "production" {
-		_ = InitProduction()
-	} else {
-		_ = InitDevelopment()
-	}
-}
+// Removed init() function to prevent it from overriding logger config.
+// The logger will be initialized when Init() is explicitly called with config.
+// func init() {
+// 	// Initialize with development logger by default
+// 	// This will be overridden when Init() is called with proper config
+// 	if os.Getenv("ENV") == "production" {
+// 		_ = InitProduction()
+// 	} else {
+// 		_ = InitDevelopment()
+// 	}
+// }