diff --git a/package.json b/package.json
index 49fbc21..6ffaae6 100644
--- a/package.json
+++ b/package.json
@@ -45,6 +45,7 @@
     "vscode": "^1.1.37"
   },
   "dependencies": {
+    "diff": "^8.0.2",
     "highlight.js": "^11.11.1",
     "marked": "^16.1.1"
   }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index fabc715..411919a 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -8,6 +8,9 @@ importers:
 
   .:
     dependencies:
+      diff:
+        specifier: ^8.0.2
+        version: 8.0.2
       highlight.js:
         specifier: ^11.11.1
         version: 11.11.1
@@ -95,6 +98,10 @@ packages:
     resolution: {integrity: sha512-A46qtFgd+g7pDZinpnwiRJtxbC1hpgf0uzP3iG89scHk0AUC7A1TGxf5OiiOUv/JMZR8GOt8hL900hV0bOy5xA==}
     engines: {node: '>=0.3.1'}
 
+  diff@8.0.2:
+    resolution: {integrity: sha512-sSuxWU5j5SR9QQji/o2qMvqRNYRDOcBTgsJ/DeCf4iSN4gW+gNMXM7wFIP+fdXZxoNiAnHUTGjCr+TSWXdRDKg==}
+    engines: {node: '>=0.3.1'}
+
   es6-promise@4.2.8:
     resolution: {integrity: sha512-HJDGx5daxeIvxdBxvG2cb9g4tEvwIk3i8+nhX0yGrYmZUzbkdg8QbDevheDB8gd0//uPj4c1EQua8Q+MViT0/w==}
 
@@ -275,6 +282,8 @@ snapshots:
 
   diff@3.5.0: {}
 
+  diff@8.0.2: {}
+
   es6-promise@4.2.8: {}
 
   es6-promisify@5.0.0: