diff --git a/packages/@ember/canary-features/index.ts b/packages/@ember/canary-features/index.ts
index ff6570bd84e..9099973e3d8 100644
--- a/packages/@ember/canary-features/index.ts
+++ b/packages/@ember/canary-features/index.ts
@@ -16,12 +16,12 @@ export const DEFAULT_FEATURES = {
   EMBER_LIBRARIES_ISREGISTERED: null,
   EMBER_IMPROVED_INSTRUMENTATION: null,
   EMBER_MODULE_UNIFICATION: false,
-  EMBER_METAL_TRACKED_PROPERTIES: null,
+  EMBER_METAL_TRACKED_PROPERTIES: true,
   EMBER_GLIMMER_FORWARD_MODIFIERS_WITH_SPLATTRIBUTES: true,
   EMBER_GLIMMER_ANGLE_BRACKET_BUILT_INS: true,
   EMBER_NATIVE_DECORATOR_SUPPORT: true,
   EMBER_GLIMMER_FN_HELPER: true,
-  EMBER_CUSTOM_COMPONENT_ARG_PROXY: null,
+  EMBER_CUSTOM_COMPONENT_ARG_PROXY: true,
   EMBER_FRAMEWORK_OBJECT_OWNER_ARGUMENT: true,
   EMBER_GLIMMER_SET_COMPONENT_TEMPLATE: null,
 };