diff --git a/practice5/yarn.lock b/practice5/yarn.lock
index e9023ed..c1af49b 100644
--- a/practice5/yarn.lock
+++ b/practice5/yarn.lock
@@ -1810,14 +1810,15 @@ browserify-zlib@^0.2.0:
     pako "~1.0.5"
 
 browserslist@^4.0.0, browserslist@^4.12.0, browserslist@^4.3.4, browserslist@^4.5.4, browserslist@^4.6.4:
-  version "4.14.6"
-  resolved "https://registry.npm.taobao.org/browserslist/download/browserslist-4.14.6.tgz#97702a9c212e0c6b6afefad913d3a1538e348457"
-  integrity sha1-l3AqnCEuDGtq/vrZE9OhU440hFc=
+  version "4.16.6"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.16.6.tgz#d7901277a5a88e554ed305b183ec9b0c08f66fa2"
+  integrity sha512-Wspk/PqO+4W9qp5iUTJsa1B/QrYn1keNCcEP5OvP7WBwT4KaDly0uONYmC6Xa3Z5IqnUgS0KcgLYu1l74x0ZXQ==
   dependencies:
-    caniuse-lite "^1.0.30001154"
-    electron-to-chromium "^1.3.585"
+    caniuse-lite "^1.0.30001219"
+    colorette "^1.2.2"
+    electron-to-chromium "^1.3.723"
     escalade "^3.1.1"
-    node-releases "^1.1.65"
+    node-releases "^1.1.71"
 
 buffer-from@^1.0.0:
   version "1.1.1"
@@ -1996,10 +1997,10 @@ caniuse-api@^3.0.0:
     lodash.memoize "^4.1.2"
     lodash.uniq "^4.5.0"
 
-caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000981, caniuse-lite@^1.0.30001109, caniuse-lite@^1.0.30001154:
-  version "1.0.30001156"
-  resolved "https://registry.npm.taobao.org/caniuse-lite/download/caniuse-lite-1.0.30001156.tgz?cache=0&sync_timestamp=1604556304810&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fcaniuse-lite%2Fdownload%2Fcaniuse-lite-1.0.30001156.tgz#75c20937b6012fe2b02ab58b30d475bf0718de97"
-  integrity sha1-dcIJN7YBL+KwKrWLMNR1vwcY3pc=
+caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000981, caniuse-lite@^1.0.30001109, caniuse-lite@^1.0.30001219:
+  version "1.0.30001228"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001228.tgz#bfdc5942cd3326fa51ee0b42fbef4da9d492a7fa"
+  integrity sha512-QQmLOGJ3DEgokHbMSA8cj2a+geXqmnpyOFT0lhQV6P3/YOJvGDEwoedcwxEQ30gJIwIIunHIicunJ2rzK5gB2A==
 
 case-sensitive-paths-webpack-plugin@^2.2.0:
   version "2.3.0"
@@ -2274,10 +2275,10 @@ color@^3.0.0:
     color-convert "^1.9.1"
     color-string "^1.5.4"
 
-colorette@^1.2.1:
-  version "1.2.1"
-  resolved "https://registry.npm.taobao.org/colorette/download/colorette-1.2.1.tgz?cache=0&sync_timestamp=1593955783467&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fcolorette%2Fdownload%2Fcolorette-1.2.1.tgz#4d0b921325c14faf92633086a536db6e89564b1b"
-  integrity sha1-TQuSEyXBT6+SYzCGpTbbbolWSxs=
+colorette@^1.2.1, colorette@^1.2.2:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.2.tgz#cbcc79d5e99caea2dbf10eb3a26fd8b3e6acfa94"
+  integrity sha512-MKGMzyfeuutC/ZJ1cba9NqcNpfeqMUcYmyF1ZFY6/Cn7CNSAKx6a+s48sqLqyAiZuaP2TcqMhoo+dlwFnVxT9w==
 
 combined-stream@^1.0.6, combined-stream@~1.0.6:
   version "1.0.8"
@@ -3069,10 +3070,10 @@ ejs@^2.6.1:
   resolved "https://registry.npm.taobao.org/ejs/download/ejs-2.7.4.tgz?cache=0&sync_timestamp=1597678424776&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fejs%2Fdownload%2Fejs-2.7.4.tgz#48661287573dcc53e366c7a1ae52c3a120eec9ba"
   integrity sha1-SGYSh1c9zFPjZsehrlLDoSDuybo=
 
-electron-to-chromium@^1.3.585:
-  version "1.3.591"
-  resolved "https://registry.npm.taobao.org/electron-to-chromium/download/electron-to-chromium-1.3.591.tgz?cache=0&sync_timestamp=1604718237551&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Felectron-to-chromium%2Fdownload%2Felectron-to-chromium-1.3.591.tgz#a18892bf1acb93f7b6e4da402705d564bc235017"
-  integrity sha1-oYiSvxrLk/e25NpAJwXVZLwjUBc=
+electron-to-chromium@^1.3.723:
+  version "1.3.737"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.737.tgz#196f2e9656f4f3c31930750e1899c091b72d36b5"
+  integrity sha512-P/B84AgUSQXaum7a8m11HUsYL8tj9h/Pt5f7Hg7Ty6bm5DxlFq+e5+ouHUoNQMsKDJ7u4yGfI8mOErCmSH9wyg==
 
 element-ui@^2.7.2:
   version "2.14.0"
@@ -3217,8 +3218,8 @@ es-to-primitive@^1.2.1:
 
 escalade@^3.1.1:
   version "3.1.1"
-  resolved "https://registry.npm.taobao.org/escalade/download/escalade-3.1.1.tgz?cache=0&sync_timestamp=1602567261690&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fescalade%2Fdownload%2Fescalade-3.1.1.tgz#d8cfdc7000965c5a0174b4a82eaa5c0552742e40"
-  integrity sha1-2M/ccACWXFoBdLSoLqpcBVJ0LkA=
+  resolved "https://registry.yarnpkg.com/escalade/-/escalade-3.1.1.tgz#d8cfdc7000965c5a0174b4a82eaa5c0552742e40"
+  integrity sha512-k0er2gUkLf8O0zKJiAhmkTnJlTvINGv7ygDNPbeIsX/TJjGJZHuh9B2UxbsaEkmlEo9MfhrSzmhIlhRlI2GXnw==
 
 escape-html@~1.0.3:
   version "1.0.3"
@@ -5594,10 +5595,10 @@ node-libs-browser@^2.2.1:
     util "^0.11.0"
     vm-browserify "^1.0.1"
 
-node-releases@^1.1.65:
-  version "1.1.66"
-  resolved "https://registry.npm.taobao.org/node-releases/download/node-releases-1.1.66.tgz#609bd0dc069381015cd982300bae51ab4f1b1814"
-  integrity sha1-YJvQ3AaTgQFc2YIwC65Rq08bGBQ=
+node-releases@^1.1.71:
+  version "1.1.72"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.72.tgz#14802ab6b1039a79a0c7d662b610a5bbd76eacbe"
+  integrity sha512-LLUo+PpH3dU6XizX3iVoubUNheF/owjXCZZ5yACDxNnPtgFuludV1ZL3ayK1kVep42Rmm0+R9/Y60NQbZ2bifw==
 
 normalize-package-data@^2.5.0:
   version "2.5.0"