diff --git a/composer.json b/composer.json
index 55ed0ed..d7fad86 100644
--- a/composer.json
+++ b/composer.json
@@ -29,7 +29,7 @@
     },
     "require-dev": {
         "mockery/mockery": "^1.4",
-        "orchestra/testbench": "^5.0|^6.0"
+        "orchestra/testbench": "^6.21.1"
     },
     "config": {
         "sort-packages": true