diff --git a/appengine/flexible/supervisord/replacement/composer.json b/appengine/flexible/supervisord/replacement/composer.json
index ad2aec1b01..85463c984d 100644
--- a/appengine/flexible/supervisord/replacement/composer.json
+++ b/appengine/flexible/supervisord/replacement/composer.json
@@ -1,5 +1,5 @@
 {
     "require": {
-        "react/http": "^0.8"
+        "react/http": "^1.0"
     }
 }