diff --git a/package-lock.json b/package-lock.json
index ad0cfd1a..1a11c7e0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -29,7 +29,6 @@
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@@ -208,9 +207,9 @@
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@@ -220,32 +219,32 @@
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-        "@babel/types": "^7.15.4"
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@@ -254,9 +253,9 @@
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@@ -286,12 +285,12 @@
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@@ -333,19 +332,15 @@
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@@ -475,19 +470,21 @@
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@@ -508,9 +505,9 @@
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@@ -545,9 +530,9 @@
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@@ -604,6 +589,21 @@
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@@ -678,6 +678,12 @@
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+      "deprecated": "do not use this version, it is broken",
+      "dev": true,
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@@ -797,6 +807,15 @@
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-          "version": "7.2.0",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.0.tgz",
-          "integrity": "sha512-lmLf6gtyrPq8tTjSmrO94wBeQbFR3HbLHbuyD69wuyQkImp2hWqMGB47OX65FBkPffO641IP9jWa1z4ivqG26Q==",
+          "version": "7.1.6",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
+          "integrity": "sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==",
           "dev": true,
           "requires": {
             "fs.realpath": "^1.0.0",
@@ -13617,9 +13295,9 @@
           "dev": true
         },
         "source-map-support": {
-          "version": "0.5.20",
-          "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.20.tgz",
-          "integrity": "sha512-n1lZZ8Ve4ksRqizaBQgxXDgKwttHDhyfQjA6YZZn8+AroHbsIz+JjwxQDxbp+7y5OYCI8t1Yk7etjD9CRd2hIw==",
+          "version": "0.5.19",
+          "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.19.tgz",
+          "integrity": "sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==",
           "dev": true,
           "requires": {
             "buffer-from": "^1.0.0",
@@ -13794,6 +13472,15 @@
             }
           }
         },
+        "which": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+          "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+          "dev": true,
+          "requires": {
+            "isexe": "^2.0.0"
+          }
+        },
         "widest-line": {
           "version": "3.1.0",
           "bundled": true,
@@ -13868,9 +13555,9 @@
       },
       "dependencies": {
         "debug": {
-          "version": "4.3.2",
-          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.2.tgz",
-          "integrity": "sha512-mOp8wKcvj7XxC78zLgw/ZA+6TSgkoE2C/ienthhRD298T7UNwAg9diBpLRxC0mOezLl4B0xV7M0cCO6P/O0Xhw==",
+          "version": "4.3.1",
+          "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.1.tgz",
+          "integrity": "sha512-doEwdvm4PCeK4K3RQN2ZC2BYUBaxwLARCqZmMjtF8a51J2Rb0xpVloFRnCODwqjpwnAoao4pelN8l3RJdv3gRQ==",
           "dev": true,
           "requires": {
             "ms": "2.1.2"
@@ -13883,9 +13570,9 @@
           "dev": true
         },
         "glob": {
-          "version": "7.2.0",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.0.tgz",
-          "integrity": "sha512-lmLf6gtyrPq8tTjSmrO94wBeQbFR3HbLHbuyD69wuyQkImp2hWqMGB47OX65FBkPffO641IP9jWa1z4ivqG26Q==",
+          "version": "7.1.7",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.7.tgz",
+          "integrity": "sha512-OvD9ENzPLbegENnYP5UUfJIirTg4+XwMWGaQfQTY0JenxNvvIKP3U3/tAQSPIu/lHxXYSZmpXlUHeqAIdKzBLQ==",
           "dev": true,
           "requires": {
             "fs.realpath": "^1.0.0",
@@ -13946,9 +13633,9 @@
       },
       "dependencies": {
         "glob": {
-          "version": "7.2.0",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.0.tgz",
-          "integrity": "sha512-lmLf6gtyrPq8tTjSmrO94wBeQbFR3HbLHbuyD69wuyQkImp2hWqMGB47OX65FBkPffO641IP9jWa1z4ivqG26Q==",
+          "version": "7.1.7",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.7.tgz",
+          "integrity": "sha512-OvD9ENzPLbegENnYP5UUfJIirTg4+XwMWGaQfQTY0JenxNvvIKP3U3/tAQSPIu/lHxXYSZmpXlUHeqAIdKzBLQ==",
           "dev": true,
           "requires": {
             "fs.realpath": "^1.0.0",
@@ -14060,9 +13747,9 @@
           "dev": true
         },
         "source-map-support": {
-          "version": "0.5.20",
-          "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.20.tgz",
-          "integrity": "sha512-n1lZZ8Ve4ksRqizaBQgxXDgKwttHDhyfQjA6YZZn8+AroHbsIz+JjwxQDxbp+7y5OYCI8t1Yk7etjD9CRd2hIw==",
+          "version": "0.5.19",
+          "resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.19.tgz",
+          "integrity": "sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==",
           "dev": true,
           "requires": {
             "buffer-from": "^1.0.0",
@@ -14112,23 +13799,11 @@
       }
     },
     "typescript": {
-      "version": "3.9.10",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.10.tgz",
-      "integrity": "sha512-w6fIxVE/H1PkLKcCPsFqKE7Kv7QUwhU8qQY2MueZXWx5cPZdwFupLgKK3vntcK98BtNHZtAF4LA/yl2a7k8R6Q==",
+      "version": "3.9.9",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.9.tgz",
+      "integrity": "sha512-kdMjTiekY+z/ubJCATUPlRDl39vXYiMV9iyeMuEuXZh2we6zz80uovNN2WlAxmmdE/Z/YQe+EbOEXB5RHEED3w==",
       "dev": true
     },
-    "unbox-primitive": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/unbox-primitive/-/unbox-primitive-1.0.1.tgz",
-      "integrity": "sha512-tZU/3NqK3dA5gpE1KtyiJUrEB0lxnGkMFHptJ7q6ewdZ8s12QrODwNbhIJStmJkd1QDXa1NRA8aF2A1zk/Ypyw==",
-      "dev": true,
-      "requires": {
-        "function-bind": "^1.1.1",
-        "has-bigints": "^1.0.1",
-        "has-symbols": "^1.0.2",
-        "which-boxed-primitive": "^1.0.2"
-      }
-    },
     "underscore": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/underscore/-/underscore-1.6.0.tgz",
@@ -14160,9 +13835,9 @@
       "dev": true
     },
     "uri-js": {
-      "version": "4.4.1",
-      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
-      "integrity": "sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg==",
+      "version": "4.2.2",
+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.2.2.tgz",
+      "integrity": "sha512-KY9Frmirql91X2Qgjry0Wd4Y+YTdrdZheS8TFwvkbLWf/G5KNJDCh6pKL5OZctEW4+0Baa5idK2ZQuELRwPznQ==",
       "dev": true,
       "requires": {
         "punycode": "^2.1.0"
@@ -14244,14 +13919,6 @@
         "assert-plus": "^1.0.0",
         "core-util-is": "1.0.2",
         "extsprintf": "^1.2.0"
-      },
-      "dependencies": {
-        "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=",
-          "dev": true
-        }
       }
     },
     "vlq": {
@@ -14279,9 +13946,9 @@
       },
       "dependencies": {
         "glob": {
-          "version": "7.2.0",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.0.tgz",
-          "integrity": "sha512-lmLf6gtyrPq8tTjSmrO94wBeQbFR3HbLHbuyD69wuyQkImp2hWqMGB47OX65FBkPffO641IP9jWa1z4ivqG26Q==",
+          "version": "7.1.6",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.6.tgz",
+          "integrity": "sha512-LwaxwyZ72Lk7vZINtNNrywX0ZuLyStrdDtabefZKAY5ZGJhVtgdznluResxNmPitE0SAO+O26sWTHeKSI2wMBA==",
           "dev": true,
           "requires": {
             "fs.realpath": "^1.0.0",
@@ -14310,25 +13977,25 @@
       }
     },
     "which": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
-      "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+      "version": "1.3.1",
+      "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+      "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
       "dev": true,
       "requires": {
         "isexe": "^2.0.0"
       }
     },
     "which-boxed-primitive": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/which-boxed-primitive/-/which-boxed-primitive-1.0.2.tgz",
-      "integrity": "sha512-bwZdv0AKLpplFY2KZRX6TvyuN7ojjr7lwkg6ml0roIy9YeuSr7JS372qlNW18UQYzgYK9ziGcerWqZOmEn9VNg==",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/which-boxed-primitive/-/which-boxed-primitive-1.0.1.tgz",
+      "integrity": "sha512-7BT4TwISdDGBgaemWU0N0OU7FeAEJ9Oo2P1PHRm/FCWoEi2VLWC9b6xvxAA3C/NMpxg3HXVgi0sMmGbNUbNepQ==",
       "dev": true,
       "requires": {
-        "is-bigint": "^1.0.1",
-        "is-boolean-object": "^1.1.0",
-        "is-number-object": "^1.0.4",
-        "is-string": "^1.0.5",
-        "is-symbol": "^1.0.3"
+        "is-bigint": "^1.0.0",
+        "is-boolean-object": "^1.0.0",
+        "is-number-object": "^1.0.3",
+        "is-string": "^1.0.4",
+        "is-symbol": "^1.0.2"
       }
     },
     "which-collection": {
@@ -14349,20 +14016,6 @@
       "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=",
       "dev": true
     },
-    "which-typed-array": {
-      "version": "1.1.7",
-      "resolved": "https://registry.npmjs.org/which-typed-array/-/which-typed-array-1.1.7.tgz",
-      "integrity": "sha512-vjxaB4nfDqwKI0ws7wZpxIlde1XrLX5uB0ZjpfshgmapJMD7jJWhZI+yToJTqaFByF0eNBcYxbjmCzoRP7CfEw==",
-      "dev": true,
-      "requires": {
-        "available-typed-arrays": "^1.0.5",
-        "call-bind": "^1.0.2",
-        "es-abstract": "^1.18.5",
-        "foreach": "^2.0.5",
-        "has-tostringtag": "^1.0.0",
-        "is-typed-array": "^1.1.7"
-      }
-    },
     "window-size": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/window-size/-/window-size-0.1.0.tgz",
@@ -14404,12 +14057,6 @@
         }
       }
     },
-    "wordwrap": {
-      "version": "0.0.2",
-      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.2.tgz",
-      "integrity": "sha1-t5Zpu0LstAn4PVg8rVLKF+qhZD8=",
-      "dev": true
-    },
     "wrap-ansi": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
@@ -14467,6 +14114,14 @@
       "dev": true,
       "requires": {
         "lodash": "^3.5.0"
+      },
+      "dependencies": {
+        "lodash": {
+          "version": "3.10.1",
+          "resolved": "https://registry.npmjs.org/lodash/-/lodash-3.10.1.tgz",
+          "integrity": "sha1-W/Rejkm6QYnhfUgnid/RW9FAt7Y=",
+          "dev": true
+        }
       }
     },
     "y18n": {
@@ -14503,6 +14158,14 @@
         "decamelize": "^1.0.0",
         "window-size": "0.1.0",
         "wordwrap": "0.0.2"
+      },
+      "dependencies": {
+        "wordwrap": {
+          "version": "0.0.2",
+          "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-0.0.2.tgz",
+          "integrity": "sha1-t5Zpu0LstAn4PVg8rVLKF+qhZD8=",
+          "dev": true
+        }
       }
     },
     "yargs-parser": {
diff --git a/package.json b/package.json
index 546d652c..b4336141 100644
--- a/package.json
+++ b/package.json
@@ -102,7 +102,6 @@
     "common-style": "^3.0.0",
     "eol": "^0.9.1",
     "express": "^4.17.1",
-    "mkdirp": "^0.5.0",
     "request": "^2.88.2",
     "tap": "^14.11.0"
   },
diff --git a/test/core-error.test.js b/test/core-error.test.js
index 6b82bbc1..e494512b 100644
--- a/test/core-error.test.js
+++ b/test/core-error.test.js
@@ -4,13 +4,12 @@ const test = require('tap').test;
 const ecstatic = require('../lib/core');
 const http = require('http');
 const request = require('request');
-const mkdirp = require('mkdirp');
 const path = require('path');
 
 const root = `${__dirname}/public`;
 const baseDir = 'base';
 
-mkdirp.sync(`${root}/emptyDir`);
+require('fs').mkdirSync(`${root}/emptyDir`, {recursive: true});
 
 const cases = require('./fixtures/common-cases-error');
 
diff --git a/test/core.test.js b/test/core.test.js
index eca15af4..9978ee8a 100644
--- a/test/core.test.js
+++ b/test/core.test.js
@@ -4,14 +4,13 @@ const test = require('tap').test;
 const ecstatic = require('../lib/core');
 const http = require('http');
 const request = require('request');
-const mkdirp = require('mkdirp');
 const path = require('path');
 const eol = require('eol');
 
 const root = `${__dirname}/public`;
 const baseDir = 'base';
 
-mkdirp.sync(`${root}/emptyDir`);
+require('fs').mkdirSync(`${root}/emptyDir`, {recursive: true});
 
 const cases = require('./fixtures/common-cases');
 
diff --git a/test/express-error.test.js b/test/express-error.test.js
index 1129224e..4cbb7eed 100644
--- a/test/express-error.test.js
+++ b/test/express-error.test.js
@@ -5,13 +5,12 @@ const ecstatic = require('../lib/core');
 const http = require('http');
 const express = require('express');
 const request = require('request');
-const mkdirp = require('mkdirp');
 const path = require('path');
 
 const root = `${__dirname}/public`;
 const baseDir = 'base';
 
-mkdirp.sync(`${root}/emptyDir`);
+require('fs').mkdirSync(`${root}/emptyDir`, {recursive: true});
 
 const cases = require('./fixtures/common-cases-error');
 
diff --git a/test/express.test.js b/test/express.test.js
index 62fe3f94..f7f57281 100644
--- a/test/express.test.js
+++ b/test/express.test.js
@@ -5,14 +5,13 @@ const ecstatic = require('../lib/core');
 const http = require('http');
 const express = require('express');
 const request = require('request');
-const mkdirp = require('mkdirp');
 const path = require('path');
 const eol = require('eol');
 
 const root = `${__dirname}/public`;
 const baseDir = 'base';
 
-mkdirp.sync(`${root}/emptyDir`);
+require('fs').mkdirSync(`${root}/emptyDir`, {recursive: true});
 
 const cases = require('./fixtures/common-cases');