diff --git a/shard.yml b/shard.yml
index f364f0f..49ac735 100644
--- a/shard.yml
+++ b/shard.yml
@@ -6,7 +6,7 @@ description: |
 authors:
   - Michael Miller <icy.arctic.fox@gmail.com>
 
-crystal: ">= 1.6.0, < 1.11"
+crystal: ">= 1.6.0, < 1.13"
 
 license: MIT