diff --git a/package-lock.json b/package-lock.json
index e682c0c..53f9349 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -20,6 +20,7 @@
       },
       "devDependencies": {
         "@types/chai": "^4.2.15",
+        "@types/chai-as-promised": "^7.1.3",
         "@types/inquirer": "^7.3.1",
         "@types/lodash": "^4.14.168",
         "@types/luxon": "^1.25.2",
@@ -29,6 +30,7 @@
         "@typescript-eslint/eslint-plugin": "^4.15.0",
         "@typescript-eslint/parser": "^4.15.0",
         "chai": "^4.3.3",
+        "chai-as-promised": "^7.1.1",
         "dotenv": "^8.2.0",
         "eslint": "^7.21.0",
         "eslint-config-prettier": "^8.1.0",
@@ -486,6 +488,15 @@
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       "dev": true
     },
+    "node_modules/@types/chai-as-promised": {
+      "version": "7.1.3",
+      "resolved": "https://registry.npmjs.org/@types/chai-as-promised/-/chai-as-promised-7.1.3.tgz",
+      "integrity": "sha512-FQnh1ohPXJELpKhzjuDkPLR2BZCAqed+a6xV4MI/T3XzHfd2FlarfUGUdZYgqYe8oxkYn0fchHEeHfHqdZ96sg==",
+      "dev": true,
+      "dependencies": {
+        "@types/chai": "*"
+      }
+    },
     "node_modules/@types/color-name": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
@@ -1034,6 +1045,18 @@
         "node": ">=4"
       }
     },
+    "node_modules/chai-as-promised": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/chai-as-promised/-/chai-as-promised-7.1.1.tgz",
+      "integrity": "sha512-azL6xMoi+uxu6z4rhWQ1jbdUhOMhis2PvscD/xjLqNMkv3BPPp2JyyuTHOrf9BOosGpNQ11v6BKv/g57RXbiaA==",
+      "dev": true,
+      "dependencies": {
+        "check-error": "^1.0.2"
+      },
+      "peerDependencies": {
+        "chai": ">= 2.1.2 < 5"
+      }
+    },
     "node_modules/chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -5428,6 +5451,15 @@
       "integrity": "sha512-rYff6FI+ZTKAPkJUoyz7Udq3GaoDZnxYDEvdEdFZASiA7PoErltHezDishqQiSDWrGxvxmplH304jyzQmjp0AQ==",
       "dev": true
     },
+    "@types/chai-as-promised": {
+      "version": "7.1.3",
+      "resolved": "https://registry.npmjs.org/@types/chai-as-promised/-/chai-as-promised-7.1.3.tgz",
+      "integrity": "sha512-FQnh1ohPXJELpKhzjuDkPLR2BZCAqed+a6xV4MI/T3XzHfd2FlarfUGUdZYgqYe8oxkYn0fchHEeHfHqdZ96sg==",
+      "dev": true,
+      "requires": {
+        "@types/chai": "*"
+      }
+    },
     "@types/color-name": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
@@ -5864,6 +5896,15 @@
         "type-detect": "^4.0.5"
       }
     },
+    "chai-as-promised": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/chai-as-promised/-/chai-as-promised-7.1.1.tgz",
+      "integrity": "sha512-azL6xMoi+uxu6z4rhWQ1jbdUhOMhis2PvscD/xjLqNMkv3BPPp2JyyuTHOrf9BOosGpNQ11v6BKv/g57RXbiaA==",
+      "dev": true,
+      "requires": {
+        "check-error": "^1.0.2"
+      }
+    },
     "chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
diff --git a/package.json b/package.json
index 1690a1c..51733b3 100644
--- a/package.json
+++ b/package.json
@@ -46,6 +46,7 @@
   },
   "devDependencies": {
     "@types/chai": "^4.2.15",
+    "@types/chai-as-promised": "^7.1.3",
     "@types/inquirer": "^7.3.1",
     "@types/lodash": "^4.14.168",
     "@types/luxon": "^1.25.2",
@@ -55,6 +56,7 @@
     "@typescript-eslint/eslint-plugin": "^4.15.0",
     "@typescript-eslint/parser": "^4.15.0",
     "chai": "^4.3.3",
+    "chai-as-promised": "^7.1.1",
     "dotenv": "^8.2.0",
     "eslint": "^7.21.0",
     "eslint-config-prettier": "^8.1.0",