diff --git a/deno.json b/deno.json
index 1b3a853c3714..3c320d1f749d 100644
--- a/deno.json
+++ b/deno.json
@@ -2,7 +2,8 @@
   "compilerOptions": {
     "strict": true,
     "useUnknownInCatchVariables": true,
-    "noImplicitOverride": true
+    "noImplicitOverride": true,
+    "noUncheckedIndexedAccess": true
   },
   "imports": {
     "https://deno.land/std@$STD_VERSION/": "./",