diff --git a/Formula/mruby.rb b/Formula/mruby.rb
index f0a1fa8ea3..b3b9a9ad4d 100644
--- a/Formula/mruby.rb
+++ b/Formula/mruby.rb
@@ -1,8 +1,8 @@
 class Mruby < Formula
   desc "Lightweight implementation of the Ruby language"
   homepage "https://mruby.org/"
-  url "https://github.com/mruby/mruby/archive/1.2.0.tar.gz"
-  sha256 "05ad0135a9c34158ff0cfd4631f4fbaed28cbb8243680d2c97ffdb9c246b1f3d"
+  url "https://github.com/mruby/mruby/archive/1.3.0.tar.gz"
+  sha256 "10c6645ec59b5f8cd80069e7297abc514b54af3540722102b5b968033a209bf4"
 
   head "https://github.com/mruby/mruby.git"