diff --git a/.eslintrc.json b/.eslintrc.json
index d4ae215b..39c5e964 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -10,6 +10,7 @@
         "es2017": true,
         "webextensions": true
     },
+    "plugins": ["no-unsanitized"],
     "ignorePatterns": [
         "/ext/mixed/lib/",
         "/ext/bg/js/templates.js"
@@ -32,7 +33,9 @@
         "quote-props": ["error", "consistent"],
         "quotes": ["error", "single", "avoid-escape"],
         "require-atomic-updates": "off",
-        "semi": "error"
+        "semi": "error",
+        "no-unsanitized/method": "error",
+        "no-unsanitized/property": "error"
     },
     "overrides": [
         {
diff --git a/package-lock.json b/package-lock.json
index 0d8eb27f..11cf28bc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -264,6 +264,12 @@
                 "v8-compile-cache": "^2.0.3"
             }
         },
+        "eslint-plugin-no-unsanitized": {
+            "version": "3.0.2",
+            "resolved": "https://registry.npmjs.org/eslint-plugin-no-unsanitized/-/eslint-plugin-no-unsanitized-3.0.2.tgz",
+            "integrity": "sha512-JnwpoH8Sv4QOjrTDutENBHzSnyYtspdjtglYtqUtAHe6f6LLKqykJle+UwFPg23GGwt5hI3amS9CRDezW8GAww==",
+            "dev": true
+        },
         "eslint-scope": {
             "version": "5.0.0",
             "resolved": "https://registry.npmjs.org/eslint-scope/-/eslint-scope-5.0.0.tgz",
diff --git a/package.json b/package.json
index eb1fb25c..8e71de59 100644
--- a/package.json
+++ b/package.json
@@ -25,6 +25,7 @@
     },
     "homepage": "https://foosoft.net/projects/yomichan/",
     "devDependencies": {
-        "eslint": "^6.8.0"
+        "eslint": "^6.8.0",
+        "eslint-plugin-no-unsanitized": "^3.0.2"
     }
 }