diff --git a/app/manifest/v2/chrome.json b/app/manifest/v2/chrome.json
index e4bb01cdd..9a2d91271 100644
--- a/app/manifest/v2/chrome.json
+++ b/app/manifest/v2/chrome.json
@@ -1,4 +1,5 @@
 {
+  "content_security_policy": "frame-ancestors 'none'",
   "externally_connectable": {
     "matches": ["https://metamask.io/*"],
     "ids": ["*"]
diff --git a/app/manifest/v3/chrome.json b/app/manifest/v3/chrome.json
index e4bb01cdd..9e21aa058 100644
--- a/app/manifest/v3/chrome.json
+++ b/app/manifest/v3/chrome.json
@@ -1,4 +1,7 @@
 {
+  "content_security_policy": {
+    "extension_pages": "default-src 'self'; frame-ancestors 'none'"
+  },
   "externally_connectable": {
     "matches": ["https://metamask.io/*"],
     "ids": ["*"]