1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Graph/GEXF.pm b/lib/Graph/GEXF.pm
index ae4bf33..8f7d1ef 100644
--- a/lib/Graph/GEXF.pm
+++ b/lib/Graph/GEXF.pm
@@ -16,7 +16,7 @@ with
 
 has visualization => (
     is        => 'ro',
-    isa       => 'Boolean',
+    isa       => 'Bool',
     predicate => 'has_visualization',
 );