diff --git a/composer.json b/composer.json
index 933f681f..dbf72567 100755
--- a/composer.json
+++ b/composer.json
@@ -17,6 +17,9 @@
     },
     "require": {
         "php": ">=7.1.3",
+        "ext-json": "*",
+        "ext-mbstring": "*",
+
         "doctrine/cache": "1.8.0",
         "thunderer/shortcode": "0.7.2",
         "flextype-components/arr" : "1.2.5",