diff --git a/data/config.dist.json b/data/config.dist.json
index 1576e3f7..212d250f 100644
--- a/data/config.dist.json
+++ b/data/config.dist.json
@@ -7,6 +7,7 @@
   "php-core-extensions" : [
     "Core",
     "date",
+    "json",
     "pcre",
     "Phar",
     "Reflection",