diff --git a/package.json b/package.json
index 3c5f6f4..af75519 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,9 @@
   "dependencies": {
     "@marp-team/marp-cli": "^1.0.3",
     "foreman": "^3.0.1",
-    "node-sass": "^6.0.0"
+    "node-sass": "^6.0.0",
+    "json-schema": ">=0.4.0",
+    "ansi-regex": ">=5.0.1"
   },
   "devDependencies": {
     "@marp-team/marp-core": "^2.0.2",