diff --git a/tsconfig.json b/tsconfig.json
index e107fb6e545..0a1b6daa54a 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,7 +3,8 @@
     "esModuleInterop": true,
     "module": "Node16",
     "moduleResolution": "Node16",
-    "noEmit": true
+    "noEmit": true,
+    "noUncheckedIndexedAccess": true
   },
   "references": [
     { "path": "./packages/accounts-controller" },
diff --git a/tsconfig.packages.json b/tsconfig.packages.json
index 8d0d5aee5ed..2ad5e02f29d 100644
--- a/tsconfig.packages.json
+++ b/tsconfig.packages.json
@@ -5,6 +5,7 @@
     "lib": ["ES2020", "DOM"],
     "module": "Node16",
     "moduleResolution": "Node16",
+    "noUncheckedIndexedAccess": true,
     /**
      * Here we ensure that TypeScript resolves `@metamask/*` imports to the
      * uncompiled source code for packages that live in this repo.