diff --git a/composer.json b/composer.json
index ea6952d..34d7eda 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
   ],
   "require": {
     "php": ">=8.3",
-    "milpa/core": "^0.6.2 || ^0.7",
+    "milpa/core": ">=0.6.2 <1.0",
     "doctrine/orm": "^3.0"
   },
   "require-dev": {