diff --git a/shard.yml b/shard.yml
index 57ce8bb..76a9784 100644
--- a/shard.yml
+++ b/shard.yml
@@ -7,7 +7,7 @@ authors:
 dependencies:
   radix:
     github: luislavena/radix
-    version: ~> 0.3.8
+    version: ~> 0.4.0
   kilt:
     github: jeromegn/kilt
     version: ~> 0.4.0