diff --git a/.gitignore b/.gitignore
index 88e99d5..cb42441 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
-vendor
-composer.lock
\ No newline at end of file
+/.idea/
+/vendor/
+/composer.lock
\ No newline at end of file
diff --git a/src/ClassFinder.php b/src/ClassFinder.php
index 2f37a40..f0ff4a9 100644
--- a/src/ClassFinder.php
+++ b/src/ClassFinder.php
@@ -155,6 +155,10 @@ protected function searchClassMap()
     {
         foreach ($this->composer->getClassMap() as $fqcn => $file)
         {
+            if (!is_string($file)){
+                continue;
+            }
+          
             if (Str::s($fqcn)->is($this->namespace.'*'))
             {
                 $this->foundClasses[realpath($file)] = $fqcn;