diff --git a/package-lock.json b/package-lock.json
index 29f7784..5dbc1b3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -326,6 +326,25 @@
       "integrity": "sha512-rr+OQyAjxze7GgWrSaJwydHStIhHq2lvY3BOC2Mj7KnzI7XK0Uw1TOOdI9lDoajEbSWLiYgoo4f1R51erQfhPQ==",
       "dev": true
     },
+    "@types/node": {
+      "version": "17.0.14",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-17.0.14.tgz",
+      "integrity": "sha512-SbjLmERksKOGzWzPNuW7fJM7fk3YXVTFiZWB/Hs99gwhk+/dnrQRPBQjPW9aO+fi1tAffi9PrwFvsmOKmDTyng=="
+    },
+    "@types/webidl-conversions": {
+      "version": "6.1.1",
+      "resolved": "https://registry.npmjs.org/@types/webidl-conversions/-/webidl-conversions-6.1.1.tgz",
+      "integrity": "sha512-XAahCdThVuCFDQLT7R7Pk/vqeObFNL3YqRyFZg+AqAP/W1/w3xHaIxuW7WszQqTbIBOPRcItYJIou3i/mppu3Q=="
+    },
+    "@types/whatwg-url": {
+      "version": "8.2.1",
+      "resolved": "https://registry.npmjs.org/@types/whatwg-url/-/whatwg-url-8.2.1.tgz",
+      "integrity": "sha512-2YubE1sjj5ifxievI5Ge1sckb9k/Er66HyR2c+3+I6VDUUg1TLPdYYTEbQ+DjRkS4nTxMJhgWfSfMRD2sl2EYQ==",
+      "requires": {
+        "@types/node": "*",
+        "@types/webidl-conversions": "*"
+      }
+    },
     "acorn": {
       "version": "5.7.4",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
@@ -472,57 +491,10 @@
       "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
       "dev": true
     },
-    "bl": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/bl/-/bl-2.2.1.tgz",
-      "integrity": "sha512-6Pesp1w0DEX1N550i/uGV/TqucVL4AM/pgThFSN/Qq9si1/DF9aIHs1BxD8V/QU0HoeHO6cQRTAuYnLPKq1e4g==",
-      "requires": {
-        "readable-stream": "^2.3.5",
-        "safe-buffer": "^5.1.1"
-      },
-      "dependencies": {
-        "isarray": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
-          "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
-        },
-        "readable-stream": {
-          "version": "2.3.7",
-          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.7.tgz",
-          "integrity": "sha512-Ebho8K4jIbHAxnuxi7o42OrZgF/ZTNcsZj6nRKyUmkhLFq8CHItp/fy6hQZuZmP/n3yZ9VBUbp4zz/mX8hmYPw==",
-          "requires": {
-            "core-util-is": "~1.0.0",
-            "inherits": "~2.0.3",
-            "isarray": "~1.0.0",
-            "process-nextick-args": "~2.0.0",
-            "safe-buffer": "~5.1.1",
-            "string_decoder": "~1.1.1",
-            "util-deprecate": "~1.0.1"
-          },
-          "dependencies": {
-            "safe-buffer": {
-              "version": "5.1.2",
-              "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-              "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
-            }
-          }
-        },
-        "string_decoder": {
-          "version": "1.1.1",
-          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
-          "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
-          "requires": {
-            "safe-buffer": "~5.1.0"
-          },
-          "dependencies": {
-            "safe-buffer": {
-              "version": "5.1.2",
-              "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-              "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
-            }
-          }
-        }
-      }
+    "base64-js": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
+      "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA=="
     },
     "brace-expansion": {
       "version": "1.1.11",
@@ -541,9 +513,21 @@
       "dev": true
     },
     "bson": {
-      "version": "1.1.6",
-      "resolved": "https://registry.npmjs.org/bson/-/bson-1.1.6.tgz",
-      "integrity": "sha512-EvVNVeGo4tHxwi8L6bPj3y3itEvStdwvvlojVxxbyYfoaxJ6keLgrTuKdyfEAszFK+H3olzBuafE0yoh0D1gdg=="
+      "version": "4.6.1",
+      "resolved": "https://registry.npmjs.org/bson/-/bson-4.6.1.tgz",
+      "integrity": "sha512-I1LQ7Hz5zgwR4QquilLNZwbhPw0Apx7i7X9kGMBTsqPdml/03Q9NBtD9nt/19ahjlphktQImrnderxqpzeVDjw==",
+      "requires": {
+        "buffer": "^5.6.0"
+      }
+    },
+    "buffer": {
+      "version": "5.7.1",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
+      "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
+      "requires": {
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.1.13"
+      }
     },
     "buffer-from": {
       "version": "1.1.1",
@@ -812,7 +796,8 @@
     "core-util-is": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
-      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
+      "dev": true
     },
     "cross-spawn": {
       "version": "5.1.0",
@@ -862,9 +847,9 @@
       }
     },
     "denque": {
-      "version": "1.5.1",
-      "resolved": "https://registry.npmjs.org/denque/-/denque-1.5.1.tgz",
-      "integrity": "sha512-XwE+iZ4D6ZUB7mfYRMb5wByE8L74HCn30FBN7sWnXksWc1LO1bPDl67pBR9o/kC4z/xSNAwkMYcGgqDV3BE3Hw=="
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/denque/-/denque-2.0.1.tgz",
+      "integrity": "sha512-tfiWc6BQLXNLpNiR5iGd0Ocu3P3VpxfzFiqubLgMfhfOw9WyvgJBd46CClNn9k3qfbjvT//0cf7AlYRX/OslMQ=="
     },
     "diff": {
       "version": "3.5.0",
@@ -1340,6 +1325,11 @@
         "safer-buffer": ">= 2.1.2 < 3"
       }
     },
+    "ieee754": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
+      "integrity": "sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA=="
+    },
     "ignore": {
       "version": "3.3.10",
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-3.3.10.tgz",
@@ -1371,7 +1361,8 @@
     "inherits": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
-      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="
+      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+      "dev": true
     },
     "inquirer": {
       "version": "3.3.0",
@@ -1395,6 +1386,11 @@
         "through": "^2.3.6"
       }
     },
+    "ip": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/ip/-/ip-1.1.5.tgz",
+      "integrity": "sha1-vd7XARQpCCjAoDnnLvJfWq7ENUo="
+    },
     "is-fullwidth-code-point": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
@@ -1860,16 +1856,24 @@
       }
     },
     "mongodb": {
-      "version": "3.7.0",
-      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-3.7.0.tgz",
-      "integrity": "sha512-JOAYjT9WYeRFkIP6XtDidAr3qvpfLRJhT2iokRWWH0tgqCQr9kmSfOJBZ3Ry0E5A3EqKxVPVhN3MV8Gn03o7pA==",
+      "version": "4.3.1",
+      "resolved": "https://registry.npmjs.org/mongodb/-/mongodb-4.3.1.tgz",
+      "integrity": "sha512-sNa8APSIk+r4x31ZwctKjuPSaeKuvUeNb/fu/3B6dRM02HpEgig7hTHM8A/PJQTlxuC/KFWlDlQjhsk/S43tBg==",
       "requires": {
-        "bl": "^2.2.1",
-        "bson": "^1.1.4",
-        "denque": "^1.4.1",
-        "optional-require": "^1.0.3",
-        "safe-buffer": "^5.1.2",
-        "saslprep": "^1.0.0"
+        "bson": "^4.6.1",
+        "denque": "^2.0.1",
+        "mongodb-connection-string-url": "^2.4.1",
+        "saslprep": "^1.0.3",
+        "socks": "^2.6.1"
+      }
+    },
+    "mongodb-connection-string-url": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/mongodb-connection-string-url/-/mongodb-connection-string-url-2.4.2.tgz",
+      "integrity": "sha512-mZUXF6nUzRWk5J3h41MsPv13ukWlH4jOMSk6astVeoZ1EbdTJyF5I3wxKkvqBAOoVtzLgyEYUvDjrGdcPlKjAw==",
+      "requires": {
+        "@types/whatwg-url": "^8.2.1",
+        "whatwg-url": "^11.0.0"
       }
     },
     "ms": {
@@ -1987,14 +1991,6 @@
         "mimic-fn": "^1.0.0"
       }
     },
-    "optional-require": {
-      "version": "1.1.7",
-      "resolved": "https://registry.npmjs.org/optional-require/-/optional-require-1.1.7.tgz",
-      "integrity": "sha512-cIeRZocXsZnZYn+SevbtSqNlLbeoS4mLzuNn4fvXRMDRNhTGg0sxuKXl0FnZCtnew85LorNxIbZp5OeliILhMw==",
-      "requires": {
-        "require-at": "^1.0.6"
-      }
-    },
     "optionator": {
       "version": "0.8.3",
       "resolved": "https://registry.npmjs.org/optionator/-/optionator-0.8.3.tgz",
@@ -2123,7 +2119,8 @@
     "process-nextick-args": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
-      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag=="
+      "integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag==",
+      "dev": true
     },
     "process-on-spawn": {
       "version": "1.0.0",
@@ -2146,6 +2143,11 @@
       "integrity": "sha1-8FKijacOYYkX7wqKw0wa5aaChrM=",
       "dev": true
     },
+    "punycode": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
+      "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A=="
+    },
     "readable-stream": {
       "version": "1.1.14",
       "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.1.14.tgz",
@@ -2173,11 +2175,6 @@
         "es6-error": "^4.0.1"
       }
     },
-    "require-at": {
-      "version": "1.0.6",
-      "resolved": "https://registry.npmjs.org/require-at/-/require-at-1.0.6.tgz",
-      "integrity": "sha512-7i1auJbMUrXEAZCOQ0VNJgmcT2VOKPRl2YGJwgpHpC9CE91Mv4/4UYIUm4chGJaI381ZDq1JUicFii64Hapd8g=="
-    },
     "require-directory": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
@@ -2269,11 +2266,6 @@
         "rx-lite": "*"
       }
     },
-    "safe-buffer": {
-      "version": "5.2.1",
-      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
-      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ=="
-    },
     "safer-buffer": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
@@ -2363,6 +2355,20 @@
         "is-fullwidth-code-point": "^2.0.0"
       }
     },
+    "smart-buffer": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/smart-buffer/-/smart-buffer-4.2.0.tgz",
+      "integrity": "sha512-94hK0Hh8rPqQl2xXc3HsaBoOXKV20MToPkcXvwbISWLEs+64sBq5kFgn2kJDHb1Pry9yrP0dxrCI9RRci7RXKg=="
+    },
+    "socks": {
+      "version": "2.6.1",
+      "resolved": "https://registry.npmjs.org/socks/-/socks-2.6.1.tgz",
+      "integrity": "sha512-kLQ9N5ucj8uIcxrDwjm0Jsqk06xdpBjGNQtpXy4Q8/QY2k+fY7nZH8CARy+hkbG+SGAovmzzuauCpBlb8FrnBA==",
+      "requires": {
+        "ip": "^1.1.5",
+        "smart-buffer": "^4.1.0"
+      }
+    },
     "source-map": {
       "version": "0.5.7",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
@@ -2524,6 +2530,14 @@
       "integrity": "sha1-3F5pjL0HkmW8c+A3doGk5Og/YW4=",
       "dev": true
     },
+    "tr46": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-3.0.0.tgz",
+      "integrity": "sha512-l7FvfAHlcmulp8kr+flpQZmVwtu7nfRV7NZujtN0OqES8EL4O4e0qqzL0DC5gAvx/ZC/9lk6rhcUwYvkBnBnYA==",
+      "requires": {
+        "punycode": "^2.1.1"
+      }
+    },
     "twostep": {
       "version": "0.4.2",
       "resolved": "https://registry.npmjs.org/twostep/-/twostep-0.4.2.tgz",
@@ -2573,7 +2587,8 @@
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
+      "dev": true
     },
     "uuid": {
       "version": "3.3.3",
@@ -2581,6 +2596,20 @@
       "integrity": "sha512-pW0No1RGHgzlpHJO1nsVrHKpOEIxkGg1xB+v0ZmdNH5OAeAwzAVrCnI2/6Mtx+Uys6iaylxa+D3g4j63IKKjSQ==",
       "dev": true
     },
+    "webidl-conversions": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-7.0.0.tgz",
+      "integrity": "sha512-VwddBukDzu71offAQR975unBIGqfKZpM+8ZX6ySk8nYhVoo5CYaZyzt3YBvYtRtO+aoGlqxPg/B87NGVZ/fu6g=="
+    },
+    "whatwg-url": {
+      "version": "11.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-11.0.0.tgz",
+      "integrity": "sha512-RKT8HExMpoYx4igMiVMY83lN6UeITKJlBQ+vR/8ZJ8OCdSiN3RwCq+9gH0+Xzj0+5IrM6i4j/6LuvzbZIQgEcQ==",
+      "requires": {
+        "tr46": "^3.0.0",
+        "webidl-conversions": "^7.0.0"
+      }
+    },
     "which": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
diff --git a/package.json b/package.json
index 7f19422..6f6dcef 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "rate-limit-mongo",
   "description": "Provides a Mongo store for the express-rate-limit  middleware.",
-  "version": "2.3.2",
+  "version": "2.4.0",
   "author": "2do2go team <dev.2do2go@gmail.com>",
   "license": "MIT",
   "main": "lib/index.js",
@@ -26,7 +26,7 @@
     "mongodb"
   ],
   "dependencies": {
-    "mongodb": "^3.6.7",
+    "mongodb": "^4.3.1",
     "twostep": "0.4.2",
     "underscore": "1.12.1"
   },