diff --git a/internal/config/config.go b/internal/config/config.go
index 6e80c32..5500044 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -46,6 +46,7 @@ type config struct { // nolint
 	DisableCompression bool          // DISABLE_COMPRESSION
 	InsecureTLS        bool          // Disables TLS validation on request endpoints.
 	JwtSecretKey       string        // JWT_SECRET_KEY
+	VerboseLog         bool          // VERBOSE_LOG
 }
 
 // Setup configurations with environment variables
@@ -98,6 +99,10 @@ func Setup() {
 	if b, err := strconv.ParseBool(os.Getenv("INSECURE_TLS")); err == nil {
 		insecureTLS = b
 	}
+	verboseLog := false
+	if b, err := strconv.ParseBool(os.Getenv("VERBOSE_LOG")); err == nil {
+		verboseLog = b
+	}
 	Config = &config{
 		AwsRegion:          region,
 		AwsAPIEndpoint:     os.Getenv("AWS_API_ENDPOINT"),
@@ -128,6 +133,7 @@ func Setup() {
 		DisableCompression: disableCompression,
 		InsecureTLS:        insecureTLS,
 		JwtSecretKey:       os.Getenv("JWT_SECRET_KEY"),
+		VerboseLog:         verboseLog,
 	}
 	// Proxy
 	log.Printf("[config] Proxy to %v", Config.S3Bucket)
diff --git a/internal/controllers/s3.go b/internal/controllers/s3.go
index 7243e7c..4feafed 100644
--- a/internal/controllers/s3.go
+++ b/internal/controllers/s3.go
@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"log"
 	"net/http"
 	"reflect"
 	"sort"
@@ -50,6 +51,9 @@ func AwsS3(w http.ResponseWriter, r *http.Request) {
 		replaced, err := replacePathWithSymlink(client, c.S3Bucket, c.S3KeyPrefix+path[:idx+12])
 		if err != nil {
 			code, message := toHTTPError(err)
+			if c.VerboseLog {
+				log.Printf(message)
+			}
 			http.Error(w, message, code)
 			return
 		}
@@ -58,7 +62,7 @@ func AwsS3(w http.ResponseWriter, r *http.Request) {
 	// Ends with / -> listing or index.html
 	if strings.HasSuffix(path, "/") {
 		if c.DirectoryListing {
-			s3listFiles(w, r, client, c.S3Bucket, c.S3KeyPrefix+path)
+			s3listFiles(w, r, client, c.S3Bucket, c.S3KeyPrefix+path, c.VerboseLog)
 			return
 		}
 		path += c.IndexDocument
@@ -67,6 +71,9 @@ func AwsS3(w http.ResponseWriter, r *http.Request) {
 	obj, err := client.S3get(c.S3Bucket, c.S3KeyPrefix+path, rangeHeader)
 	if err != nil {
 		code, message := toHTTPError(err)
+		if c.VerboseLog {
+			log.Printf(message)
+		}
 		http.Error(w, message, code)
 		return
 	}
@@ -141,12 +148,15 @@ func setTimeHeader(w http.ResponseWriter, key string, value *time.Time) {
 	}
 }
 
-func s3listFiles(w http.ResponseWriter, r *http.Request, client service.AWS, bucket, prefix string) {
+func s3listFiles(w http.ResponseWriter, r *http.Request, client service.AWS, bucket, prefix string, verboseLog bool) {
 	prefix = strings.TrimPrefix(prefix, "/")
 
 	result, err := client.S3listObjects(bucket, prefix)
 	if err != nil {
 		code, message := toHTTPError(err)
+		if verboseLog {
+			log.Printf(message)
+		}
 		http.Error(w, message, code)
 		return
 	}