diff --git a/composer.json b/composer.json
index 095ff849..0b1a66ae 100644
--- a/composer.json
+++ b/composer.json
@@ -24,6 +24,9 @@
     "zaporylie/composer-drupal-optimizations": "^1.0",
     "php-parallel-lint/php-parallel-lint": "^1.2"
   },
+  "conflict": {
+    "psy/psysh": ">= 0.12.22"
+  },
   "scripts": {
     "post-install-cmd": ["rm -rf ./tests"]
   },