diff --git a/composer.json b/composer.json
index c84dbe7..257565d 100644
--- a/composer.json
+++ b/composer.json
@@ -27,6 +27,9 @@
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.4"
     },
+    "conflict": {
+        "dnadesign/silverstripe-elemental": ">= 5.3.0"
+    },
     "extra": {
         "expose": [
             "client/dist",