diff --git a/README.md b/README.md
index 92cbe79..49711e3 100644
--- a/README.md
+++ b/README.md
@@ -21,9 +21,16 @@ protected $middleware = [
 
 Add your target environment into `.env`
 ~~~bash
-    VRKANSAGARA_COMPRESS_ENVIRONMENT='prod,testing,dev'
+    VRKANSAGARA_COMPRESS_ENVIRONMENT='prod,testing,dev,local'
 ~~~
 
+
+If you want to see how much you compress on each page, set bellow line in `.env`
+~~~bash
+    VRKANSAGARA_COMPRESS_DEBUG=0
+~~~
+
+
 ### Display usage on each page.
 
 Set `$debug = 1;` in `AfterMiddleware.php`
diff --git a/src/Http/Middleware/AfterMiddleware.php b/src/Http/Middleware/AfterMiddleware.php
index 584f149..d7dd54c 100644
--- a/src/Http/Middleware/AfterMiddleware.php
+++ b/src/Http/Middleware/AfterMiddleware.php
@@ -26,11 +26,12 @@ class AfterMiddleware
     public function handle($request, Closure $next)
     {
 
-        $isDebug = isset(getenv('VRKANSAGARA_COMPRESS_DEBUG'))
-            && ! empty(getenv('VRKANSAGARA_COMPRESS_DEBUG'))
-        getenv('VRKANSAGARA_COMPRESS_DEBUG')
-        : 0;
-
+        $isDebug = null !== getenv('VRKANSAGARA_COMPRESS_DEBUG')
+            ? getenv('VRKANSAGARA_COMPRESS_DEBUG')
+            : 0;
+        if ($isDebug) {
+            $this->debug = 1;
+        }
         $targetEnvironment = explode(
             ',', getenv('VRKANSAGARA_COMPRESS_ENVIRONMENT')
         );