diff --git a/extensions/json/package.json b/extensions/json/package.json
index 6ef4b971691..e66955770bc 100644
--- a/extensions/json/package.json
+++ b/extensions/json/package.json
@@ -27,7 +27,8 @@
           ".swcrc",
           ".webmanifest",
           ".js.map",
-          ".css.map"
+          ".css.map",
+          ".har"
         ],
         "filenames": [
           "composer.lock",