diff --git a/shard.yml b/shard.yml
index bfabbbc..ab4e9e4 100644
--- a/shard.yml
+++ b/shard.yml
@@ -4,17 +4,20 @@ version: 0.2.0
 authors:
   - David Roetzel <david@roetzel.de>
 
-crystal: ">= 1.0.0"
+crystal: ">= 1.4.0"
 
 license: MIT
 
 dependencies:
   carbon:
     github: luckyframework/carbon
-    version: ~> 0.2.0
+    version: ~> 0.3.0
   email:
     github: arcage/crystal-email
     version: ~> 0.6.1
 development_dependencies:
   devmail:
     github: tijn/devmail
+  ameba:
+    github: crystal-ameba/ameba
+    version: ~> 1.1.0
diff --git a/src/carbon_smtp_adapter.cr b/src/carbon_smtp_adapter.cr
index 035a0bf..10a8b04 100644
--- a/src/carbon_smtp_adapter.cr
+++ b/src/carbon_smtp_adapter.cr
@@ -5,5 +5,5 @@ require "email"
 require "./carbon/adapters/smtp_adapter"
 
 module CarbonSmtpAdapter
-  VERSION = "0.1.0"
+  VERSION = {{ `shards version "#{__DIR__}"`.chomp.stringify }}
 end