diff --git a/lib/validators/schema.js b/lib/validators/schema.js
index 7c297dca..230dad25 100644
--- a/lib/validators/schema.js
+++ b/lib/validators/schema.js
@@ -41,7 +41,7 @@ function validateSchema(api, options) {
     schema = openapi.v2;
     ajv = initializeAjv();
   } else if (api.openapi.startsWith('3.1')) {
-    schema = openapi.v31;
+    schema = openapi.v31legacy;
 
     // There's a bug with Ajv in how it handles `$dynamicRef` in the way that it's used within the 3.1 schema so we
     // need to do some adhoc workarounds.