diff --git a/themes/lotusdocs b/themes/lotusdocs
index 5afd426..22d1bab 160000
--- a/themes/lotusdocs
+++ b/themes/lotusdocs
@@ -1 +1 @@
-Subproject commit 5afd42611e80c2b9ef3fd8623e6d3f348e2cde9c
+Subproject commit 22d1bab159e5331857e5c849fbeca400ae561a7a
diff --git a/vercel.json b/vercel.json
index 1fc18bd..cba7ae9 100644
--- a/vercel.json
+++ b/vercel.json
@@ -1,5 +1,30 @@
 {
     "headers": [
+        {
+            "source": "/(.*)",
+            "headers": [
+                {
+                    "key": "X-Content-Type-Options",
+                    "value": "nosniff"
+                },
+                {
+                    "key": "X-Frame-Options",
+                    "value": "SAMEORIGIN"
+                },
+                {
+                    "key": "X-XSS-Protection",
+                    "value": "1; mode=block"
+                },
+                {
+                    "key": "Referrer-Policy",
+                    "value": "strict-origin"
+                },
+                {
+                    "key": "Permissions-Policy",
+                    "value": "geolocation=(self), microphone=()"
+                }
+            ]
+        },
         {
             "source": "/docs/fonts/:all*(woff2)",
             "headers": [