diff --git a/app.json b/app.json
index 74bf005d..ec1d4409 100644
--- a/app.json
+++ b/app.json
@@ -10,7 +10,7 @@
       "required": false
     },
     "HEROKU_EMBER_CLI_DEPLOY": {
-      "required": true
+      "required": false
     },
     "WORKER_COUNT": {
       "required": false
@@ -22,7 +22,8 @@
   ],
   "buildpacks": [
     {
-      "url": "https://codon-buildpacks.s3.amazonaws.com/buildpacks/heroku/emberjs.tgz"
+      "url": "https://buildpack-registry.s3.amazonaws.com/buildpacks/aedev/emberjs.tgz"
     }
-  ]
+  ],
+  "stack": "heroku-20"
 }
diff --git a/package.json b/package.json
index 83bc4711..e9d9d416 100644
--- a/package.json
+++ b/package.json
@@ -106,9 +106,9 @@
     "testem": "^2.14.0"
   },
   "engines": {
-    "node": "10.* || >= 12",
-    "npm": "5",
-    "yarn": "^1.22.0"
+    "node": "10.* || 12.* || 14.*",
+    "npm": "7",
+    "yarn": "1.22.10"
   },
   "ember": {
     "edition": "octane"
@@ -123,7 +123,7 @@
     "abortcontroller-polyfill/dist/cjs-ponyfill"
   ],
   "volta": {
-    "node": "12.16.1",
-    "yarn": "1.22.4"
+    "node": "14.17.0",
+    "yarn": "1.22.10"
   }
 }