diff --git a/package.json b/package.json
index a6af8c0..66e4eee 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
     "author": "",
     "license": "ISC",
     "dependencies": {
+        "@types/greasemonkey": "^4.0.3",
         "esbuild": "^0.14.42",
         "eslint": "^8.17.0",
         "prettier": "^2.6.2",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e860719..4b16b02 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1,12 +1,14 @@
 lockfileVersion: 5.3
 
 specifiers:
+    '@types/greasemonkey': ^4.0.3
     esbuild: ^0.14.42
     eslint: ^8.17.0
     prettier: ^2.6.2
     typescript: ^4.7.3
 
 dependencies:
+    '@types/greasemonkey': 4.0.3
     esbuild: 0.14.42
     eslint: 8.17.0
     prettier: 2.6.2
@@ -54,6 +56,13 @@ packages:
             }
         dev: false
 
+    /@types/greasemonkey/4.0.3:
+        resolution:
+            {
+                integrity: sha512-ryPWLtjXJJJrHBiimtYcpgonOXf5YtsDYgGme1XP8H0U6oon6b7oYEHLSLyr/57epDdy4PyGpZgZcdvEhK2w0w==,
+            }
+        dev: false
+
     /acorn-jsx/5.3.2_acorn@8.7.1:
         resolution:
             {