diff --git a/shard.yml b/shard.yml
index 9065082..f6eb3b5 100644
--- a/shard.yml
+++ b/shard.yml
@@ -6,7 +6,7 @@ description: |
 authors:
   - Michael Miller <icy.arctic.fox@gmail.com>
 
-crystal: 0.30.1
+crystal: 0.31.0
 
 license: MIT