diff --git a/package-lock.json b/package-lock.json
index a66d7cd..9a0861c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
         "vuedraggable": "^2.24.3"
       },
       "devDependencies": {
-        "@vuepress/plugin-back-to-top": "1.9.5",
+        "@vuepress/plugin-back-to-top": "1.9.7",
         "@vuepress/plugin-medium-zoom": "1.9.7",
         "jsdom": "19.0.0",
         "markdown-it-attrs": "4.1.3",
@@ -2224,17 +2224,6 @@
         "node": ">=8.6"
       }
     },
-    "node_modules/@vuepress/core/node_modules/@vuepress/types": {
-      "version": "1.9.7",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-      "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
     "node_modules/@vuepress/core/node_modules/cross-spawn": {
       "version": "6.0.5",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
@@ -2357,24 +2346,13 @@
         "lodash.debounce": "^4.0.8"
       }
     },
-    "node_modules/@vuepress/plugin-active-header-links/node_modules/@vuepress/types": {
-      "version": "1.9.7",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-      "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
     "node_modules/@vuepress/plugin-back-to-top": {
-      "version": "1.9.5",
-      "resolved": "https://registry.npmjs.org/@vuepress/plugin-back-to-top/-/plugin-back-to-top-1.9.5.tgz",
-      "integrity": "sha512-zcESgBsH5EYQLUN+EtxDYKHyPmZXIgLEReaKU8ddRaMxzodMXW84WtCmsc0En/P9wkf4SOXZkmWllH53rZWrzQ==",
+      "version": "1.9.7",
+      "resolved": "https://registry.npmjs.org/@vuepress/plugin-back-to-top/-/plugin-back-to-top-1.9.7.tgz",
+      "integrity": "sha512-DM1S+Q8Xn/i+zhe4zThekxb1M2abfKLklg/NKtQloklHKdNdVfk+EcxWYNmNfSii+ymDWaaG8lmH0xjVhy0iXw==",
       "dev": true,
       "dependencies": {
-        "@vuepress/types": "1.9.5",
+        "@vuepress/types": "1.9.7",
         "lodash.debounce": "^4.0.8"
       }
     },
@@ -2388,17 +2366,6 @@
         "cross-spawn": "^6.0.5"
       }
     },
-    "node_modules/@vuepress/plugin-last-updated/node_modules/@vuepress/types": {
-      "version": "1.9.7",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-      "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
     "node_modules/@vuepress/plugin-last-updated/node_modules/cross-spawn": {
       "version": "6.0.5",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
@@ -2434,17 +2401,6 @@
         "medium-zoom": "^1.0.4"
       }
     },
-    "node_modules/@vuepress/plugin-medium-zoom/node_modules/@vuepress/types": {
-      "version": "1.9.7",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-      "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
     "node_modules/@vuepress/plugin-nprogress": {
       "version": "1.9.7",
       "resolved": "https://registry.npmjs.org/@vuepress/plugin-nprogress/-/plugin-nprogress-1.9.7.tgz",
@@ -2455,17 +2411,6 @@
         "nprogress": "^0.2.0"
       }
     },
-    "node_modules/@vuepress/plugin-nprogress/node_modules/@vuepress/types": {
-      "version": "1.9.7",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-      "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
     "node_modules/@vuepress/plugin-register-components": {
       "version": "1.9.7",
       "resolved": "https://registry.npmjs.org/@vuepress/plugin-register-components/-/plugin-register-components-1.9.7.tgz",
@@ -2476,17 +2421,6 @@
         "@vuepress/types": "1.9.7"
       }
     },
-    "node_modules/@vuepress/plugin-register-components/node_modules/@vuepress/types": {
-      "version": "1.9.7",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-      "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
     "node_modules/@vuepress/plugin-search": {
       "version": "1.9.7",
       "resolved": "https://registry.npmjs.org/@vuepress/plugin-search/-/plugin-search-1.9.7.tgz",
@@ -2496,17 +2430,6 @@
         "@vuepress/types": "1.9.7"
       }
     },
-    "node_modules/@vuepress/plugin-search/node_modules/@vuepress/types": {
-      "version": "1.9.7",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-      "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
     "node_modules/@vuepress/shared-utils": {
       "version": "1.9.7",
       "resolved": "https://registry.npmjs.org/@vuepress/shared-utils/-/shared-utils-1.9.7.tgz",
@@ -2542,7 +2465,7 @@
         "vuepress-plugin-smooth-scroll": "^0.0.3"
       }
     },
-    "node_modules/@vuepress/theme-default/node_modules/@vuepress/types": {
+    "node_modules/@vuepress/types": {
       "version": "1.9.7",
       "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
       "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
@@ -2553,17 +2476,6 @@
         "webpack-chain": "^6.0.0"
       }
     },
-    "node_modules/@vuepress/types": {
-      "version": "1.9.5",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.5.tgz",
-      "integrity": "sha512-fu1Wyi+cPFyn7nfxNH4MVvU5glYvRB0RMI7besq9kiI/KkZJPb2G1hITopECJOGk+6G/cOU/iSdUDUHH4GQLgA==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
     "node_modules/@webassemblyjs/ast": {
       "version": "1.9.0",
       "resolved": "https://registry.npmjs.org/@webassemblyjs/ast/-/ast-1.9.0.tgz",
@@ -15366,17 +15278,6 @@
         "smoothscroll-polyfill": "^0.4.3"
       }
     },
-    "node_modules/vuepress/node_modules/@vuepress/types": {
-      "version": "1.9.7",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-      "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
     "node_modules/w3c-hr-time": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/w3c-hr-time/-/w3c-hr-time-1.0.2.tgz",
@@ -18176,17 +18077,6 @@
         "webpackbar": "3.2.0"
       },
       "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.7",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-          "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        },
         "cross-spawn": {
           "version": "6.0.5",
           "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
@@ -18304,28 +18194,15 @@
       "requires": {
         "@vuepress/types": "1.9.7",
         "lodash.debounce": "^4.0.8"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.7",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-          "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        }
       }
     },
     "@vuepress/plugin-back-to-top": {
-      "version": "1.9.5",
-      "resolved": "https://registry.npmjs.org/@vuepress/plugin-back-to-top/-/plugin-back-to-top-1.9.5.tgz",
-      "integrity": "sha512-zcESgBsH5EYQLUN+EtxDYKHyPmZXIgLEReaKU8ddRaMxzodMXW84WtCmsc0En/P9wkf4SOXZkmWllH53rZWrzQ==",
+      "version": "1.9.7",
+      "resolved": "https://registry.npmjs.org/@vuepress/plugin-back-to-top/-/plugin-back-to-top-1.9.7.tgz",
+      "integrity": "sha512-DM1S+Q8Xn/i+zhe4zThekxb1M2abfKLklg/NKtQloklHKdNdVfk+EcxWYNmNfSii+ymDWaaG8lmH0xjVhy0iXw==",
       "dev": true,
       "requires": {
-        "@vuepress/types": "1.9.5",
+        "@vuepress/types": "1.9.7",
         "lodash.debounce": "^4.0.8"
       }
     },
@@ -18339,17 +18216,6 @@
         "cross-spawn": "^6.0.5"
       },
       "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.7",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-          "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        },
         "cross-spawn": {
           "version": "6.0.5",
           "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
@@ -18379,19 +18245,6 @@
       "requires": {
         "@vuepress/types": "1.9.7",
         "medium-zoom": "^1.0.4"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.7",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-          "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        }
       }
     },
     "@vuepress/plugin-nprogress": {
@@ -18402,19 +18255,6 @@
       "requires": {
         "@vuepress/types": "1.9.7",
         "nprogress": "^0.2.0"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.7",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-          "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        }
       }
     },
     "@vuepress/plugin-register-components": {
@@ -18425,19 +18265,6 @@
       "requires": {
         "@vuepress/shared-utils": "1.9.7",
         "@vuepress/types": "1.9.7"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.7",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-          "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        }
       }
     },
     "@vuepress/plugin-search": {
@@ -18447,19 +18274,6 @@
       "dev": true,
       "requires": {
         "@vuepress/types": "1.9.7"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.7",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-          "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        }
       }
     },
     "@vuepress/shared-utils": {
@@ -18495,25 +18309,12 @@
         "stylus-loader": "^3.0.2",
         "vuepress-plugin-container": "^2.0.2",
         "vuepress-plugin-smooth-scroll": "^0.0.3"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.7",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-          "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        }
       }
     },
     "@vuepress/types": {
-      "version": "1.9.5",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.5.tgz",
-      "integrity": "sha512-fu1Wyi+cPFyn7nfxNH4MVvU5glYvRB0RMI7besq9kiI/KkZJPb2G1hITopECJOGk+6G/cOU/iSdUDUHH4GQLgA==",
+      "version": "1.9.7",
+      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
+      "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
       "dev": true,
       "requires": {
         "@types/markdown-it": "^10.0.0",
@@ -28826,19 +28627,6 @@
         "envinfo": "^7.2.0",
         "opencollective-postinstall": "^2.0.2",
         "update-notifier": "^4.0.0"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.7",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-          "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        }
       }
     },
     "vuepress-html-webpack-plugin": {
diff --git a/package.json b/package.json
index 3f2db40..73e1073 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   },
   "license": "Apache-2.0",
   "devDependencies": {
-    "@vuepress/plugin-back-to-top": "1.9.5",
+    "@vuepress/plugin-back-to-top": "1.9.7",
     "@vuepress/plugin-medium-zoom": "1.9.7",
     "jsdom": "19.0.0",
     "markdown-it-attrs": "4.1.3",