diff --git a/composer.json b/composer.json
index 2b63f19..b1703fe 100644
--- a/composer.json
+++ b/composer.json
@@ -28,9 +28,6 @@
   "prefer-stable": true,
   "require": {
     "php": "^7.1",
-    "ext-json": "*",
-    "ext-simplexml": "*",
-    "ext-libxml": "*",
     "psr/simple-cache": "^1.0"
   },
   "require-dev": {