diff --git a/packages/transformers/webextension/src/WebExtensionTransformer.js b/packages/transformers/webextension/src/WebExtensionTransformer.js
index 0b76330174e..9c15d24ada2 100644
--- a/packages/transformers/webextension/src/WebExtensionTransformer.js
+++ b/packages/transformers/webextension/src/WebExtensionTransformer.js
@@ -43,6 +43,7 @@ async function collectDependencies(
   const filePath = asset.filePath;
   const assetDir = path.dirname(filePath);
   const isMV2 = program.manifest_version == 2;
+  delete program.$schema;
   if (program.default_locale) {
     const locales = path.join(assetDir, '_locales');
     let err = !(await fs.exists(locales))
diff --git a/packages/transformers/webextension/src/schema.js b/packages/transformers/webextension/src/schema.js
index 1a26d3a351c..e72edc25185 100644
--- a/packages/transformers/webextension/src/schema.js
+++ b/packages/transformers/webextension/src/schema.js
@@ -76,6 +76,7 @@ const warBase = {
 };
 
 const commonProps = {
+  $schema: string,
   name: string,
   version: {
     type: 'string',
@@ -496,6 +497,7 @@ export const MV2Schema = ({
 export const VersionSchema = ({
   type: 'object',
   properties: {
+    $schema: string,
     manifest_version: {
       type: 'number',
       enum: [2, 3],