diff --git a/.vscode/settings.json b/.vscode/settings.json
index 25d7d9e..ab52e95 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -29,5 +29,20 @@
   },
   "beautify.config": {
     "jslint_happy": true
-  }
+  },
+  "cSpell.words": [
+    "Epub",
+    "NISO",
+    "OEBPS",
+    "apng",
+    "devtool",
+    "dtbncx",
+    "idref",
+    "jepub",
+    "jsfiddle",
+    "jszip",
+    "lelinhtinh",
+    "uffff",
+    "uuidv"
+  ]
 }
diff --git a/demo/script.js b/demo/script.js
index 1ae3238..c9fb1d6 100644
--- a/demo/script.js
+++ b/demo/script.js
@@ -1,3 +1,6 @@
+/* cSpell:disable */
+/* spell-checker: disable */
+/* spellchecker: disable */
 /* eslint-disable no-console */
 (async () => {