diff --git a/package-lock.json b/package-lock.json
index a07375988..81c229dd4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1103,14 +1103,6 @@
       "resolved": "https://registry.npmmirror.com/decode-uri-component/-/decode-uri-component-0.2.2.tgz",
       "integrity": "sha512-FqUYQ+8o158GyGTrMFJms9qh3CqTKvAqgqsTnkLI8sKu0028orqBhxNMFkFen0zGyg6epACD32pjVk58ngIErQ=="
     },
-    "deep-assign": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmmirror.com/deep-assign/-/deep-assign-2.0.0.tgz",
-      "integrity": "sha512-2QhG3Kxulu4XIF3WL5C5x0sc/S17JLgm1SfvDfIRsR/5m7ZGmcejII7fZ2RyWhN0UWIJm0TNM/eKow6LAn3evQ==",
-      "requires": {
-        "is-obj": "^1.0.0"
-      }
-    },
     "deepmerge": {
       "version": "4.3.1",
       "resolved": "https://registry.npmmirror.com/deepmerge/-/deepmerge-4.3.1.tgz",
@@ -1833,14 +1825,6 @@
         }
       }
     },
-    "hexo-filter-mermaid-diagrams": {
-      "version": "1.0.5",
-      "resolved": "https://registry.npmmirror.com/hexo-filter-mermaid-diagrams/-/hexo-filter-mermaid-diagrams-1.0.5.tgz",
-      "integrity": "sha512-/IkIMKn4V7PBAzMJGNDPSoBFlv1JGvIELXm5AWkR8N5N44kDTNJLtabb4h095UhZQIXOrF9zA1WYhi6wrWLW5Q==",
-      "requires": {
-        "deep-assign": "^2.0.0"
-      }
-    },
     "hexo-front-matter": {
       "version": "4.2.1",
       "resolved": "https://registry.npmmirror.com/hexo-front-matter/-/hexo-front-matter-4.2.1.tgz",
@@ -3012,11 +2996,6 @@
       "resolved": "https://registry.npmmirror.com/is-number/-/is-number-7.0.0.tgz",
       "integrity": "sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng=="
     },
-    "is-obj": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmmirror.com/is-obj/-/is-obj-1.0.1.tgz",
-      "integrity": "sha512-l4RyHgRqGN4Y3+9JHVrNqO+tN0rV5My76uW5/nuO4K1b6vw5G8d/cmFjP9tRfEsdhZNt0IFdZuK/c2Vr4Nb+Qg=="
-    },
     "is-plain-object": {
       "version": "5.0.0",
       "resolved": "https://registry.npmmirror.com/is-plain-object/-/is-plain-object-5.0.0.tgz",
diff --git a/package.json b/package.json
index de2b78463..f612ba736 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,6 @@
     "cnpm": "^7.1.0",
     "hexo": "^7.3.0",
     "hexo-deployer-git": "^3.0.0",
-    "hexo-filter-mermaid-diagrams": "^1.0.5",
     "hexo-generator-archive": "^1.0.0",
     "hexo-generator-category": "^1.0.0",
     "hexo-generator-index": "^2.0.0",