diff --git a/LICENSE b/LICENSE
index 914fdd2..c5ded66 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2019-2020 Anton Maminov
+Copyright (c) 2019-2021 Anton Maminov
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/shard.yml b/shard.yml
index 04c6e26..bc240e9 100644
--- a/shard.yml
+++ b/shard.yml
@@ -1,5 +1,5 @@
 name: haversine
-version: 0.3.0
+version: 0.3.1
 
 authors:
   - Anton Maminov <anton.maminov@gmail.com>
@@ -8,6 +8,6 @@ development_dependencies:
   ameba:
     github: crystal-ameba/ameba
 
-crystal: 0.35.1
+crystal: ">= 0.35.1"
 
 license: MIT
diff --git a/src/haversine/version.cr b/src/haversine/version.cr
index 2cf8530..a4e1068 100644
--- a/src/haversine/version.cr
+++ b/src/haversine/version.cr
@@ -1,3 +1,3 @@
 module Haversine
-  VERSION = "0.3.0"
+  VERSION = {{ `shards version #{__DIR__}`.chomp.stringify }}
 end