diff --git a/book/package-lock.json b/book/package-lock.json
index 63ead32..d8dc4c0 100644
--- a/book/package-lock.json
+++ b/book/package-lock.json
@@ -27,17 +27,6 @@
         "parse5": "^3.0.1"
       }
     },
-    "clipboard": {
-      "version": "2.0.6",
-      "resolved": "https://registry.npm.taobao.org/clipboard/download/clipboard-2.0.6.tgz?cache=0&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fclipboard%2Fdownload%2Fclipboard-2.0.6.tgz",
-      "integrity": "sha1-UpISlu7A/fd+rRdJQhshyWhkc3Y=",
-      "optional": true,
-      "requires": {
-        "good-listener": "^1.2.2",
-        "select": "^1.1.2",
-        "tiny-emitter": "^2.0.0"
-      }
-    },
     "css-select": {
       "version": "1.2.0",
       "resolved": "https://registry.npm.taobao.org/css-select/download/css-select-1.2.0.tgz?cache=0&sync_timestamp=1573342118933&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fcss-select%2Fdownload%2Fcss-select-1.2.0.tgz",
@@ -54,12 +43,6 @@
       "resolved": "https://registry.npm.taobao.org/css-what/download/css-what-2.1.3.tgz",
       "integrity": "sha1-ptdgRXM2X+dGhsPzEcVlE9iChfI="
     },
-    "delegate": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npm.taobao.org/delegate/download/delegate-3.2.0.tgz",
-      "integrity": "sha1-tmtxwxWFIuirV0T3INjKDCr1kWY=",
-      "optional": true
-    },
     "dom-serializer": {
       "version": "0.1.1",
       "resolved": "https://registry.npm.taobao.org/dom-serializer/download/dom-serializer-0.1.1.tgz",
@@ -173,15 +156,6 @@
       "resolved": "https://registry.npm.taobao.org/gitbook-plugin-splitter/download/gitbook-plugin-splitter-0.0.8.tgz",
       "integrity": "sha1-8rBRMGD8kma0awQYLk7KHUtx+vw="
     },
-    "good-listener": {
-      "version": "1.2.2",
-      "resolved": "https://registry.npm.taobao.org/good-listener/download/good-listener-1.2.2.tgz",
-      "integrity": "sha1-1TswzfkxPf+33JoNR3CWqm0UXFA=",
-      "optional": true,
-      "requires": {
-        "delegate": "^3.1.2"
-      }
-    },
     "html-entities": {
       "version": "1.2.0",
       "resolved": "https://registry.npm.taobao.org/html-entities/download/html-entities-1.2.0.tgz",
@@ -300,12 +274,9 @@
       }
     },
     "prismjs": {
-      "version": "1.19.0",
-      "resolved": "https://registry.npm.taobao.org/prismjs/download/prismjs-1.19.0.tgz?cache=0&sync_timestamp=1578923040103&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fprismjs%2Fdownload%2Fprismjs-1.19.0.tgz",
-      "integrity": "sha1-cTr71Fw7rKSzIVafLfOeF+cp1Nw=",
-      "requires": {
-        "clipboard": "^2.0.0"
-      }
+      "version": "1.27.0",
+      "resolved": "https://registry.npmjs.org/prismjs/-/prismjs-1.27.0.tgz",
+      "integrity": "sha512-t13BGPUlFDR7wRB5kQDG4jjl7XeuH6jbJGt11JHPL96qwsEHNX2+68tFXqc1/k+/jALsbSWJKUOT/hcYAZ5LkA=="
     },
     "readable-stream": {
       "version": "3.6.0",
@@ -322,12 +293,6 @@
       "resolved": "https://registry.npm.taobao.org/safe-buffer/download/safe-buffer-5.2.0.tgz",
       "integrity": "sha1-t02uxJsRSPiMZLaNSbHoFcHy9Rk="
     },
-    "select": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npm.taobao.org/select/download/select-1.1.2.tgz",
-      "integrity": "sha1-DnNQrN7ICxEIUoeG7B1EGNEbOW0=",
-      "optional": true
-    },
     "string_decoder": {
       "version": "1.3.0",
       "resolved": "https://registry.npm.taobao.org/string_decoder/download/string_decoder-1.3.0.tgz",
@@ -336,12 +301,6 @@
         "safe-buffer": "~5.2.0"
       }
     },
-    "tiny-emitter": {
-      "version": "2.1.0",
-      "resolved": "https://registry.npm.taobao.org/tiny-emitter/download/tiny-emitter-2.1.0.tgz",
-      "integrity": "sha1-HRpW7fxRxD6GPLtTgqcjMONVVCM=",
-      "optional": true
-    },
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npm.taobao.org/util-deprecate/download/util-deprecate-1.0.2.tgz",