diff --git a/composer.json b/composer.json
index 77fd621d..8fbff6ed 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     "require-dev": {
         "alleyinteractive/alley-coding-standards": "^2.0",
         "mantle-framework/testkit": "^0.12",
-        "nunomaduro/collision": "^5.0"
+        "nunomaduro/collision": "^6.4"
     },
     "config": {
         "allow-plugins": {