diff --git a/package-lock.json b/package-lock.json
index 233edc9..3fdaae6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,7 +15,7 @@
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         "@sup39/markdown-it-inline-tag": "1.0.1",
         "@types/encoding-japanese": "^2.0.1",
-        "@vuepress/plugin-back-to-top": "1.9.7",
+        "@vuepress/plugin-back-to-top": "1.9.8",
         "@vuepress/plugin-medium-zoom": "1.9.8",
         "encoding-japanese": "^2.0.0",
         "jsdom": "21.1.0",
@@ -2441,17 +2441,6 @@
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-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-      "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
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       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
@@ -2552,24 +2541,13 @@
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       }
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-    "node_modules/@vuepress/plugin-active-header-links/node_modules/@vuepress/types": {
-      "version": "1.9.8",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-      "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-      "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": "1.9.7",
-      "resolved": "https://registry.npmjs.org/@vuepress/plugin-back-to-top/-/plugin-back-to-top-1.9.7.tgz",
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+      "version": "1.9.8",
+      "resolved": "https://registry.npmjs.org/@vuepress/plugin-back-to-top/-/plugin-back-to-top-1.9.8.tgz",
+      "integrity": "sha512-Unl8HMVPsqyt4q/1TIcaMH1XkQri43rjVdXKpPbC1nWTKVi1nvJpxbLfscInodX9Jlniju4Xo/uKxmugfFF1Dg==",
       "dev": true,
       "dependencies": {
-        "@vuepress/types": "1.9.7",
+        "@vuepress/types": "1.9.8",
         "lodash.debounce": "^4.0.8"
       }
     },
@@ -2583,17 +2561,6 @@
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-      "version": "1.9.8",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-      "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
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       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
@@ -2638,17 +2605,6 @@
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       }
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-    "node_modules/@vuepress/plugin-medium-zoom/node_modules/@vuepress/types": {
-      "version": "1.9.8",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-      "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
     "node_modules/@vuepress/plugin-nprogress": {
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       "resolved": "https://registry.npmjs.org/@vuepress/plugin-nprogress/-/plugin-nprogress-1.9.8.tgz",
@@ -2659,17 +2615,6 @@
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-      "version": "1.9.8",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-      "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-      "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": {
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       "resolved": "https://registry.npmjs.org/@vuepress/plugin-register-components/-/plugin-register-components-1.9.8.tgz",
@@ -2680,17 +2625,6 @@
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-      "version": "1.9.8",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-      "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-      "dev": true,
-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
-      }
-    },
     "node_modules/@vuepress/plugin-search": {
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       "resolved": "https://registry.npmjs.org/@vuepress/plugin-search/-/plugin-search-1.9.8.tgz",
@@ -2700,17 +2634,6 @@
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-    "node_modules/@vuepress/plugin-search/node_modules/@vuepress/types": {
-      "version": "1.9.8",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-      "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-      "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": "1.9.8",
       "resolved": "https://registry.npmjs.org/@vuepress/shared-utils/-/shared-utils-1.9.8.tgz",
@@ -2793,7 +2716,7 @@
         "vuepress-plugin-smooth-scroll": "^0.0.3"
       }
     },
-    "node_modules/@vuepress/theme-default/node_modules/@vuepress/types": {
+    "node_modules/@vuepress/types": {
       "version": "1.9.8",
       "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
       "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
@@ -2804,17 +2727,6 @@
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       }
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-    "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/@webassemblyjs/ast": {
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       "resolved": "https://registry.npmjs.org/@webassemblyjs/ast/-/ast-1.9.0.tgz",
@@ -16477,17 +16389,6 @@
         "smoothscroll-polyfill": "^0.4.3"
       }
     },
-    "node_modules/vuepress/node_modules/@vuepress/types": {
-      "version": "1.9.8",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-      "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
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-      "dependencies": {
-        "@types/markdown-it": "^10.0.0",
-        "@types/webpack-dev-server": "^3",
-        "webpack-chain": "^6.0.0"
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-    },
     "node_modules/w3c-xmlserializer": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-4.0.0.tgz",
@@ -19639,17 +19540,6 @@
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       },
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-          "version": "1.9.8",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-          "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
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-        },
         "cross-spawn": {
           "version": "6.0.5",
           "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
@@ -19743,28 +19633,15 @@
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         "lodash.debounce": "^4.0.8"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.8",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-          "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-          "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": "1.9.7",
-      "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==",
+      "version": "1.9.8",
+      "resolved": "https://registry.npmjs.org/@vuepress/plugin-back-to-top/-/plugin-back-to-top-1.9.8.tgz",
+      "integrity": "sha512-Unl8HMVPsqyt4q/1TIcaMH1XkQri43rjVdXKpPbC1nWTKVi1nvJpxbLfscInodX9Jlniju4Xo/uKxmugfFF1Dg==",
       "dev": true,
       "requires": {
-        "@vuepress/types": "1.9.7",
+        "@vuepress/types": "1.9.8",
         "lodash.debounce": "^4.0.8"
       }
     },
@@ -19778,17 +19655,6 @@
         "cross-spawn": "^6.0.5"
       },
       "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.8",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-          "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-          "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",
@@ -19824,19 +19690,6 @@
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         "medium-zoom": "^1.0.4"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.8",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-          "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        }
       }
     },
     "@vuepress/plugin-nprogress": {
@@ -19847,19 +19700,6 @@
       "requires": {
         "@vuepress/types": "1.9.8",
         "nprogress": "^0.2.0"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.8",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-          "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        }
       }
     },
     "@vuepress/plugin-register-components": {
@@ -19870,19 +19710,6 @@
       "requires": {
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         "@vuepress/types": "1.9.8"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.8",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-          "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        }
       }
     },
     "@vuepress/plugin-search": {
@@ -19892,19 +19719,6 @@
       "dev": true,
       "requires": {
         "@vuepress/types": "1.9.8"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.8",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-          "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        }
       }
     },
     "@vuepress/shared-utils": {
@@ -19977,25 +19791,12 @@
         "stylus-loader": "^3.0.2",
         "vuepress-plugin-container": "^2.0.2",
         "vuepress-plugin-smooth-scroll": "^0.0.3"
-      },
-      "dependencies": {
-        "@vuepress/types": {
-          "version": "1.9.8",
-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-          "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
-        }
       }
     },
     "@vuepress/types": {
-      "version": "1.9.7",
-      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.7.tgz",
-      "integrity": "sha512-moLQzkX3ED2o18dimLemUm7UVDKxhcrJmGt5C0Ng3xxrLPaQu7UqbROtEKB3YnMRt4P/CA91J+Ck+b9LmGabog==",
+      "version": "1.9.8",
+      "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
+      "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
       "dev": true,
       "requires": {
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@@ -30882,19 +30683,6 @@
         "envinfo": "^7.2.0",
         "opencollective-postinstall": "^2.0.2",
         "update-notifier": "^4.0.0"
-      },
-      "dependencies": {
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-          "resolved": "https://registry.npmjs.org/@vuepress/types/-/types-1.9.8.tgz",
-          "integrity": "sha512-ygRFqILi4SQjExxvpVUFXB/h76dN+k8GrDWYhAgmox1zhWEEzsskbqewXGKWE48RW9EJDYGgh8jy+CWvm7ILXg==",
-          "dev": true,
-          "requires": {
-            "@types/markdown-it": "^10.0.0",
-            "@types/webpack-dev-server": "^3",
-            "webpack-chain": "^6.0.0"
-          }
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       }
     },
     "vuepress-html-webpack-plugin": {
diff --git a/package.json b/package.json
index e52c4f7..694221e 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
     "@sup39/markdown-it-attr": "1.2.2",
     "@sup39/markdown-it-inline-tag": "1.0.1",
     "@types/encoding-japanese": "^2.0.1",
-    "@vuepress/plugin-back-to-top": "1.9.7",
+    "@vuepress/plugin-back-to-top": "1.9.8",
     "@vuepress/plugin-medium-zoom": "1.9.8",
     "encoding-japanese": "^2.0.0",
     "jsdom": "21.1.0",