1 files changed, 4 insertions, 3 deletions
diff --git a/lib/WebService/TFL/Bus/Response.pm b/lib/WebService/TFL/Bus/Response.pm
index a4aa056..4251228 100644
--- a/lib/WebService/TFL/Bus/Response.pm
+++ b/lib/WebService/TFL/Bus/Response.pm
@@ -1,6 +1,8 @@
 package WebService::TFL::Bus::Response;
-use Moose;
+use Moo;
 use Class::Load 'load_class';
+use Type::Utils -all;
+use Types::Standard -all;
 use JSON;
 use namespace::autoclean;
 
@@ -21,8 +23,7 @@ for my $field (values %line_map) {
     load_class($class);
     has $field => (
         is => 'ro',
-        isa => "ArrayRef[$class]",
-        traits => [ 'Array' ],
+        isa => ArrayRef[class_type { class => $class }],
     );
 }