diff --git a/composer.json b/composer.json
index b4eb1d1..eed9c18 100644
--- a/composer.json
+++ b/composer.json
@@ -37,7 +37,7 @@
         "php": ">=5.4.0",
         "lib-openssl": "*",
         "react/child-process": "^0.4.1",
-        "react/promise": "^2.4"
+        "react/promise": "^2.4 || ^3"
     },
     "require-dev": {
         "php": ">=7.0.0",