diff --git a/composer.json b/composer.json
index 8bd3a6e..df5b52e 100644
--- a/composer.json
+++ b/composer.json
@@ -2,6 +2,7 @@
     "name": "pulse00/monolog-parser",
     "description": "A parser for monolog log entries",
     "require": {
+        "ext-json": "*",
         "monolog/monolog": "1.*"
     },
     "require-dev": {