diff --git a/README.md b/README.md
index 24fca38..51575ea 100644
--- a/README.md
+++ b/README.md
@@ -17,16 +17,17 @@ What does it do?
 
 ## Usage
 ```
-   Usage of /tmp/go-build2863756334/b001/exe/main:
-   
+   Usage of /tmp/go-build262560291/b001/exe/concurrency:
   -address string
-    	IP address to bind the web ui server to. (default "127.0.0.1")
+    	IP address to bind the web UI server to. (default "127.0.0.1")
   -dictionary string
     	File to use for enumeration. (default "db/apache-list")
   -domain string
     	domain to scan
+  -extension string
+    	File extension. (default "js")
   -shodan string
-    	shadan api key
+    	shodan API key
   -verbose
     	Verbosity
 ```
diff --git a/cmd/bruter/main.go b/cmd/bruter/main.go
index 8f9cb83..fa320f0 100644
--- a/cmd/bruter/main.go
+++ b/cmd/bruter/main.go
@@ -3,16 +3,6 @@ package main
 import (
 	"flag"
 	"fmt"
-	"math"
-	"net/http"
-	"os"
-	"strings"
-	"sync"
-	"syscall"
-	"time"
-
-	"os/signal"
-
 	"github.com/CyberRoute/bruter/pkg/config"
 	"github.com/CyberRoute/bruter/pkg/fuzzer"
 	"github.com/CyberRoute/bruter/pkg/handlers"
@@ -23,6 +13,14 @@ import (
 	"github.com/fatih/color"
 	"github.com/rs/zerolog"
 	"github.com/rs/zerolog/log"
+	"math"
+	"net/http"
+	"os"
+	"os/signal"
+	"strings"
+	"sync"
+	"syscall"
+	"time"
 )
 
 type workerContext struct {
@@ -42,6 +40,7 @@ var (
 	Domain     = flag.String("domain", "", "domain to scan")
 	Apikey     = flag.String("shodan", "", "shodan API key")
 	Address    = flag.String("address", "127.0.0.1", "IP address to bind the web UI server to.")
+	Extension  = flag.String("extension", "js", "File extension.")
 	Dictionary = flag.String("dictionary", "db/apache-list", "File to use for enumeration.")
 	Verbose    = flag.Bool("verbose", false, "Verbosity")
 )
@@ -137,7 +136,7 @@ func createQueue(mu *sync.Mutex, domain string, list []string, shift, total int,
 
 	for index, payload := range list {
 		modifiedIndex := index + shift
-		payload = strings.ReplaceAll(payload, "%EXT%", "js")
+		payload = strings.ReplaceAll(payload, "%EXT%", *Extension)
 		progress := 100 * float32(modifiedIndex) / float32(total)
 		progress = float32(math.Round(float64(progress)))
 		queue.Add(async.Job(&workerContext{