diff --git a/package.json b/package.json
index 7feb73cc..2bd528c3 100644
--- a/package.json
+++ b/package.json
@@ -13,13 +13,13 @@
     "heroku-postbuild": "npm run build"
   },
   "dependencies": {
-    "js-yaml": "3.14.1",
+    "js-yaml": "4.1.0",
     "probot": "9.15.1"
   },
   "devDependencies": {
     "@types/bunyan": "1.8.8",
     "@types/jest": "26.0.24",
-    "@types/js-yaml": "3.12.7",
+    "@types/js-yaml": "4.0.5",
     "@types/node": "10.17.60",
     "jest": "26.6.3",
     "nodemon": "2.0.22",