diff --git a/shard.yml b/shard.yml
index 63be182..0188067 100644
--- a/shard.yml
+++ b/shard.yml
@@ -2,7 +2,7 @@ name: athena-negotiation
 
 version: 0.1.1
 
-crystal: '>= 0.35.0'
+crystal: ~> 1.4
 
 license: MIT
 
@@ -19,7 +19,7 @@ authors:
 development_dependencies:
   ameba:
     github: crystal-ameba/ameba
-    version: ~> 0.13.0
+    version: ~> 1.0
   athena-spec:
     github: athena-framework/spec
     version: ~> 0.2.3