diff --git a/shard.yml b/shard.yml
index bfe7f0de..bc81d954 100644
--- a/shard.yml
+++ b/shard.yml
@@ -17,6 +17,6 @@ executables:
   - ameba
   - ameba.cr
 
-crystal: "~> 1.9.0"
+crystal: ~> 1.9
 
 license: MIT