diff --git a/TypeScript-crash-course/package-lock.json b/TypeScript-crash-course/package-lock.json
index 75b6ec9..072867c 100644
--- a/TypeScript-crash-course/package-lock.json
+++ b/TypeScript-crash-course/package-lock.json
@@ -213,8 +213,8 @@
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@@ -319,9 +277,9 @@
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-      "integrity": "sha1-xV7PAhheJGklk5kxDBc84xIzsUI=",
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-      "integrity": "sha1-I8DfFPaogHf1+YbA0WfsA8PVU3w=",
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@@ -528,8 +438,8 @@
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-      "integrity": "sha1-NFThpGLujVmeI23zNs2epPiv4Qc=",
+      "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz",
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-      "integrity": "sha1-yE5bPRjZpNd1WP70ZrG/FrvrNFA=",
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@@ -725,12 +588,6 @@
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@@ -2035,8 +1809,8 @@
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-      "integrity": "sha1-SMptcvbGo68Aqa1K5odr44ieKwk=",
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@@ -2049,12 +1823,6 @@
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       "resolved": "https://registry.npmjs.org/react-is/-/react-is-16.12.0.tgz",
@@ -2927,12 +2525,12 @@
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-      "resolved": "https://registry.npm.taobao.org/readdirp/download/readdirp-3.3.0.tgz",
-      "integrity": "sha1-mERY0ToeQuLp9YQbEp4WLzaa/xc=",
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
+      "integrity": "sha512-hOS089on8RduqdbhvQ5Z37A0ESjsqz6qnRcffsMU3495FuTdqSm+7bhJ29JvIOsBDEEnan5DPu9t3To9VRlMzA==",
       "dev": true,
       "requires": {
-        "picomatch": "^2.0.7"
+        "picomatch": "^2.2.1"
       }
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@@ -2957,25 +2555,6 @@
       "integrity": "sha1-3WOYLuMwDme0HBlW+FCqaA2dMw4=",
       "dev": true
     },
-    "registry-auth-token": {
-      "version": "3.4.0",
-      "resolved": "https://registry.npm.taobao.org/registry-auth-token/download/registry-auth-token-3.4.0.tgz",
-      "integrity": "sha1-10RoFUM/XV7WQxzV3KIQSPZrOX4=",
-      "dev": true,
-      "requires": {
-        "rc": "^1.1.6",
-        "safe-buffer": "^5.0.1"
-      }
-    },
-    "registry-url": {
-      "version": "3.1.0",
-      "resolved": "https://registry.npm.taobao.org/registry-url/download/registry-url-3.1.0.tgz",
-      "integrity": "sha1-PU74cPc93h138M+aOBQyRE4XSUI=",
-      "dev": true,
-      "requires": {
-        "rc": "^1.0.1"
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     "require-uncached": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/require-uncached/-/require-uncached-1.0.3.tgz",
@@ -3046,12 +2625,6 @@
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-    "safe-buffer": {
-      "version": "5.2.0",
-      "resolved": "https://registry.npm.taobao.org/safe-buffer/download/safe-buffer-5.2.0.tgz",
-      "integrity": "sha1-t02uxJsRSPiMZLaNSbHoFcHy9Rk=",
-      "dev": true
-    },
     "safer-buffer": {
       "version": "2.1.2",
       "resolved": "https://registry.npm.taobao.org/safer-buffer/download/safer-buffer-2.1.2.tgz",
@@ -3064,23 +2637,6 @@
       "integrity": "sha1-7gpkyK9ejO6mdoexM3YeG+y9HT0=",
       "dev": true
     },
-    "semver-diff": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npm.taobao.org/semver-diff/download/semver-diff-2.1.0.tgz?cache=0&sync_timestamp=1571064474000&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fsemver-diff%2Fdownload%2Fsemver-diff-2.1.0.tgz",
-      "integrity": "sha1-S7uEN8jTfksM8aaP1ybsbWRdbTY=",
-      "dev": true,
-      "requires": {
-        "semver": "^5.0.3"
-      },
-      "dependencies": {
-        "semver": {
-          "version": "5.7.1",
-          "resolved": "https://registry.npm.taobao.org/semver/download/semver-5.7.1.tgz",
-          "integrity": "sha1-qVT5Ma66UI0we78Gnv8MAclhFvc=",
-          "dev": true
-        }
-      }
-    },
     "shebang-command": {
       "version": "1.2.0",
       "resolved": "https://registry.npm.taobao.org/shebang-command/download/shebang-command-1.2.0.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fshebang-command%2Fdownload%2Fshebang-command-1.2.0.tgz",
@@ -3102,6 +2658,23 @@
       "integrity": "sha1-tf3AjxKH6hF4Yo5BXiUTK3NkbG0=",
       "dev": true
     },
+    "simple-update-notifier": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/simple-update-notifier/-/simple-update-notifier-1.1.0.tgz",
+      "integrity": "sha512-VpsrsJSUcJEseSbMHkrsrAVSdvVS5I96Qo1QAQ4FxQ9wXFcB+pjj7FB7/us9+GcgfW4ziHtYMc1J0PLczb55mg==",
+      "dev": true,
+      "requires": {
+        "semver": "~7.0.0"
+      },
+      "dependencies": {
+        "semver": {
+          "version": "7.0.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.0.0.tgz",
+          "integrity": "sha512-+GB6zVA9LWh6zovYQLALHwv5rb2PHGlJi3lfiqIHxR0uuwCgefcOJc59v9fv1w8GbStwxuuqqAjI9NMAOOgq1A==",
+          "dev": true
+        }
+      }
+    },
     "slice-ansi": {
       "version": "2.1.0",
       "resolved": "https://registry.npm.taobao.org/slice-ansi/download/slice-ansi-2.1.0.tgz",
@@ -3268,12 +2841,6 @@
       "integrity": "sha1-IzTBjpx1n3vdVv3vfprj1YjmjtM=",
       "dev": true
     },
-    "strip-eof": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npm.taobao.org/strip-eof/download/strip-eof-1.0.0.tgz",
-      "integrity": "sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=",
-      "dev": true
-    },
     "strip-json-comments": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-2.0.1.tgz",
@@ -3332,15 +2899,6 @@
         }
       }
     },
-    "term-size": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npm.taobao.org/term-size/download/term-size-1.2.0.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fterm-size%2Fdownload%2Fterm-size-1.2.0.tgz",
-      "integrity": "sha1-RYuDiH8oj8Vtb/+/rSYuJmOO+mk=",
-      "dev": true,
-      "requires": {
-        "execa": "^0.7.0"
-      }
-    },
     "text-table": {
       "version": "0.2.0",
       "resolved": "https://registry.npm.taobao.org/text-table/download/text-table-0.2.0.tgz",
@@ -3353,12 +2911,6 @@
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
       "dev": true
     },
-    "timed-out": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npm.taobao.org/timed-out/download/timed-out-4.0.1.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Ftimed-out%2Fdownload%2Ftimed-out-4.0.1.tgz",
-      "integrity": "sha1-8y6srFoXW+ol1/q1Zas+2HQe9W8=",
-      "dev": true
-    },
     "tmp": {
       "version": "0.0.33",
       "resolved": "https://registry.npm.taobao.org/tmp/download/tmp-0.0.33.tgz",
@@ -3376,8 +2928,8 @@
     },
     "to-regex-range": {
       "version": "5.0.1",
-      "resolved": "https://registry.npm.taobao.org/to-regex-range/download/to-regex-range-5.0.1.tgz",
-      "integrity": "sha1-FkjESq58jZiKMmAY7XL1tN0DkuQ=",
+      "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
+      "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
       "dev": true,
       "requires": {
         "is-number": "^7.0.0"
@@ -3385,8 +2937,8 @@
     },
     "touch": {
       "version": "3.1.0",
-      "resolved": "https://registry.npm.taobao.org/touch/download/touch-3.1.0.tgz",
-      "integrity": "sha1-/jZfX3XsntTlaCXgu3bSSrdK+Ds=",
+      "resolved": "https://registry.npmjs.org/touch/-/touch-3.1.0.tgz",
+      "integrity": "sha512-WBx8Uy5TLtOSRtIq+M03/sKDrXCLHxwDcquSP2c43Le03/9serjQBIztjRz6FkJez9D/hleyAXTBGLwwZUw9lA==",
       "dev": true,
       "requires": {
         "nopt": "~1.0.10"
@@ -3428,39 +2980,6 @@
       "integrity": "sha512-WxONCrssBM8TSPRqN5EmsjVrsv4A8X12J4ArBiiayv3DyyG3ZlIg6yysuuSYdZsVz3TKcTg2fd//Ujd4CHV1iA==",
       "dev": true
     },
-    "unique-string": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npm.taobao.org/unique-string/download/unique-string-1.0.0.tgz",
-      "integrity": "sha1-nhBXzKhRq7kzmPizOuGHuZyuwRo=",
-      "dev": true,
-      "requires": {
-        "crypto-random-string": "^1.0.0"
-      }
-    },
-    "unzip-response": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npm.taobao.org/unzip-response/download/unzip-response-2.0.1.tgz",
-      "integrity": "sha1-0vD3N9FrBhXnKmk17QQhRXLVb5c=",
-      "dev": true
-    },
-    "update-notifier": {
-      "version": "2.5.0",
-      "resolved": "https://registry.npm.taobao.org/update-notifier/download/update-notifier-2.5.0.tgz",
-      "integrity": "sha1-0HRFk+E/Fh5AassdlAi3LK0Ir/Y=",
-      "dev": true,
-      "requires": {
-        "boxen": "^1.2.1",
-        "chalk": "^2.0.1",
-        "configstore": "^3.0.0",
-        "import-lazy": "^2.1.0",
-        "is-ci": "^1.0.10",
-        "is-installed-globally": "^0.1.0",
-        "is-npm": "^1.0.0",
-        "latest-version": "^3.0.0",
-        "semver-diff": "^2.0.0",
-        "xdg-basedir": "^3.0.0"
-      }
-    },
     "uri-js": {
       "version": "4.2.2",
       "resolved": "https://registry.npm.taobao.org/uri-js/download/uri-js-4.2.2.tgz",
@@ -3470,15 +2989,6 @@
         "punycode": "^2.1.0"
       }
     },
-    "url-parse-lax": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npm.taobao.org/url-parse-lax/download/url-parse-lax-1.0.0.tgz",
-      "integrity": "sha1-evjzA2Rem9eaJy56FKxovAYJ2nM=",
-      "dev": true,
-      "requires": {
-        "prepend-http": "^1.0.1"
-      }
-    },
     "validate-npm-package-license": {
       "version": "3.0.4",
       "resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
@@ -3498,48 +3008,6 @@
         "isexe": "^2.0.0"
       }
     },
-    "widest-line": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npm.taobao.org/widest-line/download/widest-line-2.0.1.tgz",
-      "integrity": "sha1-dDh2RzDsfvQ4HOTfgvuYpTFCo/w=",
-      "dev": true,
-      "requires": {
-        "string-width": "^2.1.1"
-      },
-      "dependencies": {
-        "ansi-regex": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npm.taobao.org/ansi-regex/download/ansi-regex-3.0.0.tgz",
-          "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
-          "dev": true
-        },
-        "is-fullwidth-code-point": {
-          "version": "2.0.0",
-          "resolved": "https://registry.npm.taobao.org/is-fullwidth-code-point/download/is-fullwidth-code-point-2.0.0.tgz",
-          "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=",
-          "dev": true
-        },
-        "string-width": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npm.taobao.org/string-width/download/string-width-2.1.1.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fstring-width%2Fdownload%2Fstring-width-2.1.1.tgz",
-          "integrity": "sha1-q5Pyeo3BPSjKyBXEYhQ6bZASrp4=",
-          "dev": true,
-          "requires": {
-            "is-fullwidth-code-point": "^2.0.0",
-            "strip-ansi": "^4.0.0"
-          }
-        },
-        "strip-ansi": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npm.taobao.org/strip-ansi/download/strip-ansi-4.0.0.tgz",
-          "integrity": "sha1-qEeQIusaw2iocTibY1JixQXuNo8=",
-          "dev": true,
-          "requires": {
-            "ansi-regex": "^3.0.0"
-          }
-        }
-      }
-    },
     "word-wrap": {
       "version": "1.2.3",
       "resolved": "https://registry.npm.taobao.org/word-wrap/download/word-wrap-1.2.3.tgz",
@@ -3560,29 +3028,6 @@
       "requires": {
         "mkdirp": "^0.5.1"
       }
-    },
-    "write-file-atomic": {
-      "version": "2.4.3",
-      "resolved": "https://registry.npm.taobao.org/write-file-atomic/download/write-file-atomic-2.4.3.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fwrite-file-atomic%2Fdownload%2Fwrite-file-atomic-2.4.3.tgz",
-      "integrity": "sha1-H9Lprh3z51uNjDZ0Q8aS1MqB9IE=",
-      "dev": true,
-      "requires": {
-        "graceful-fs": "^4.1.11",
-        "imurmurhash": "^0.1.4",
-        "signal-exit": "^3.0.2"
-      }
-    },
-    "xdg-basedir": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npm.taobao.org/xdg-basedir/download/xdg-basedir-3.0.0.tgz",
-      "integrity": "sha1-SWsswQnsqNus/i3HK2A8F8WHCtQ=",
-      "dev": true
-    },
-    "yallist": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npm.taobao.org/yallist/download/yallist-2.1.2.tgz?cache=0&sync_timestamp=1569874223546&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fyallist%2Fdownload%2Fyallist-2.1.2.tgz",
-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
-      "dev": true
     }
   }
 }
diff --git a/TypeScript-crash-course/package.json b/TypeScript-crash-course/package.json
index 16947bf..dcb4351 100644
--- a/TypeScript-crash-course/package.json
+++ b/TypeScript-crash-course/package.json
@@ -23,7 +23,7 @@
     "eslint-plugin-prettier": "^3.1.2",
     "eslint-plugin-react": "^7.17.0",
     "eslint-plugin-react-hooks": "^1.7.0",
-    "nodemon": "^2.0.2",
+    "nodemon": "^2.0.22",
     "prettier": "^1.19.1",
     "typescript": "^3.7.3"
   }