diff --git a/src/ServiceProvider.php b/src/ServiceProvider.php
index 5413e38..a605c46 100644
--- a/src/ServiceProvider.php
+++ b/src/ServiceProvider.php
@@ -64,11 +64,11 @@ public function register()
     private function formatDuration($seconds)
     {
         if ($seconds < 0.001) {
-            return round($seconds * 1000000) . 'μs';
+            return round($seconds * 1000000).'μs';
         } elseif ($seconds < 1) {
-            return round($seconds * 1000, 2) . 'ms';
+            return round($seconds * 1000, 2).'ms';
         }
 
-        return round($seconds, 2) . 's';
+        return round($seconds, 2).'s';
     }
 }