diff --git a/package.json b/package.json
index 8c5fa85..2d76827 100644
--- a/package.json
+++ b/package.json
@@ -50,6 +50,7 @@
     "is-eot": "1.0.0",
     "is-gif": "3.0.0",
     "is-jpg": "2.0.0",
+    "is-json": "2.0.1",
     "is-otf": "0.1.2",
     "is-png": "1.1.0",
     "is-svg": "3.0.0",