diff --git a/src/LaravelApiExplorer.php b/src/LaravelApiExplorer.php
index 4ce381c..5f4320e 100644
--- a/src/LaravelApiExplorer.php
+++ b/src/LaravelApiExplorer.php
@@ -5,6 +5,7 @@
 use Route;
 use ReflectionParameter;
 use ReflectionMethod;
+use Illuminate\Support\Str;
 
 class LaravelApiExplorer
 {
@@ -73,8 +74,8 @@ private function filterRoutes($routes)
             $uri = trim($route->uri(), '/');
 
             if (
-                !str_is($match, $name) &&
-                !str_is($match, $uri)
+                !Str::is($match, $name) &&
+                !Str::is($match, $uri)
             ) {
                 continue;
             }