diff --git a/composer.json b/composer.json
index c687db5..c6ac1d6 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
     "require": {
         "php": ">=5.6.0",
         "silverstripe/framework": "^4",
-        "sensiolabs/security-checker": "^5",
+        "sensiolabs/security-checker": "^5 || ^6",
         "symbiote/silverstripe-queuedjobs": "^4"
     },
     "require-dev": {