diff --git a/package-lock.json b/package-lock.json
index ece0155..8fe56a8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -914,6 +914,72 @@
         "@types/istanbul-lib-report": "*"
       }
     },
+    "@types/jest": {
+      "version": "26.0.4",
+      "resolved": "https://registry.npmjs.org/@types/jest/-/jest-26.0.4.tgz",
+      "integrity": "sha512-4fQNItvelbNA9+sFgU+fhJo8ZFF+AS4Egk3GWwCW2jFtViukXbnztccafAdLhzE/0EiCogljtQQXP8aQ9J7sFg==",
+      "dev": true,
+      "requires": {
+        "jest-diff": "^25.2.1",
+        "pretty-format": "^25.2.1"
+      },
+      "dependencies": {
+        "@jest/types": {
+          "version": "25.5.0",
+          "resolved": "https://registry.npmjs.org/@jest/types/-/types-25.5.0.tgz",
+          "integrity": "sha512-OXD0RgQ86Tu3MazKo8bnrkDRaDXXMGUqd+kTtLtK1Zb7CRzQcaSRPPPV37SvYTdevXEBVxe0HXylEjs8ibkmCw==",
+          "dev": true,
+          "requires": {
+            "@types/istanbul-lib-coverage": "^2.0.0",
+            "@types/istanbul-reports": "^1.1.1",
+            "@types/yargs": "^15.0.0",
+            "chalk": "^3.0.0"
+          }
+        },
+        "ansi-regex": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
+          "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==",
+          "dev": true
+        },
+        "diff-sequences": {
+          "version": "25.2.6",
+          "resolved": "https://registry.npmjs.org/diff-sequences/-/diff-sequences-25.2.6.tgz",
+          "integrity": "sha512-Hq8o7+6GaZeoFjtpgvRBUknSXNeJiCx7V9Fr94ZMljNiCr9n9L8H8aJqgWOQiDDGdyn29fRNcDdRVJ5fdyihfg==",
+          "dev": true
+        },
+        "jest-diff": {
+          "version": "25.5.0",
+          "resolved": "https://registry.npmjs.org/jest-diff/-/jest-diff-25.5.0.tgz",
+          "integrity": "sha512-z1kygetuPiREYdNIumRpAHY6RXiGmp70YHptjdaxTWGmA085W3iCnXNx0DhflK3vwrKmrRWyY1wUpkPMVxMK7A==",
+          "dev": true,
+          "requires": {
+            "chalk": "^3.0.0",
+            "diff-sequences": "^25.2.6",
+            "jest-get-type": "^25.2.6",
+            "pretty-format": "^25.5.0"
+          }
+        },
+        "jest-get-type": {
+          "version": "25.2.6",
+          "resolved": "https://registry.npmjs.org/jest-get-type/-/jest-get-type-25.2.6.tgz",
+          "integrity": "sha512-DxjtyzOHjObRM+sM1knti6or+eOgcGU4xVSb2HNP1TqO4ahsT+rqZg+nyqHWJSvWgKC5cG3QjGFBqxLghiF/Ig==",
+          "dev": true
+        },
+        "pretty-format": {
+          "version": "25.5.0",
+          "resolved": "https://registry.npmjs.org/pretty-format/-/pretty-format-25.5.0.tgz",
+          "integrity": "sha512-kbo/kq2LQ/A/is0PQwsEHM7Ca6//bGPPvU6UnsdDRSKTWxT/ru/xb88v4BJf6a69H+uTytOEsTusT9ksd/1iWQ==",
+          "dev": true,
+          "requires": {
+            "@jest/types": "^25.5.0",
+            "ansi-regex": "^5.0.0",
+            "ansi-styles": "^4.0.0",
+            "react-is": "^16.12.0"
+          }
+        }
+      }
+    },
     "@types/node": {
       "version": "14.0.22",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-14.0.22.tgz",
diff --git a/package.json b/package.json
index f639202..c7e5a0f 100644
--- a/package.json
+++ b/package.json
@@ -18,6 +18,7 @@
     "mongoose": "^5.9.23"
   },
   "devDependencies": {
+    "@types/jest": "^26.0.4",
     "eslint": "^7.4.0",
     "jest": "^26.1.0",
     "nodemon": "^2.0.4",