diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 74c7603..2691e51 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,7 +8,7 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-        - '2.7.5'
+        - '2.7.0'
         - '3.0'
         - '3.1'
         gemfile:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 88a3072..7744f93 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,11 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [0.5.1]
+
+### Added - 2022-09-03
+
+- Ruby 2.7.0 is now supported, not just 2.7.3 and above. This allows usage on Ubuntu 20.04 by default.
 
 ## [0.5.0] - 2022-07-07
 
@@ -42,7 +46,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 
 - 🎉 Initial release! 🎉
 
-[unreleased]: https://github.com/ruby-syntax-tree/syntax_tree-rbs/compare/v0.5.0...HEAD
+[unreleased]: https://github.com/ruby-syntax-tree/syntax_tree-rbs/compare/v0.5.1...HEAD
+[0.5.1]: https://github.com/ruby-syntax-tree/syntax_tree-rbs/compare/v0.5.0...v0.5.1
 [0.5.0]: https://github.com/ruby-syntax-tree/syntax_tree-rbs/compare/v0.4.0...v0.5.0
 [0.4.0]: https://github.com/ruby-syntax-tree/syntax_tree-rbs/compare/v0.3.0...v0.4.0
 [0.3.0]: https://github.com/ruby-syntax-tree/syntax_tree-rbs/compare/v0.2.0...v0.3.0
diff --git a/Gemfile.lock b/Gemfile.lock
index 6f08923..0f380a6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    syntax_tree-rbs (0.5.0)
+    syntax_tree-rbs (0.5.1)
       prettier_print
       rbs
       syntax_tree (>= 2.0.1)
diff --git a/lib/syntax_tree/rbs.rb b/lib/syntax_tree/rbs.rb
index f619c19..9af4f3e 100644
--- a/lib/syntax_tree/rbs.rb
+++ b/lib/syntax_tree/rbs.rb
@@ -24,8 +24,8 @@ def visit(node)
     class Formatter < PrettierPrint
       attr_reader :source
 
-      def initialize(source, ...)
-        super(...)
+      def initialize(source, *rest)
+        super(*rest)
         @source = source
         @force_parens = false
       end
diff --git a/lib/syntax_tree/rbs/version.rb b/lib/syntax_tree/rbs/version.rb
index ed6c84e..589d25f 100644
--- a/lib/syntax_tree/rbs/version.rb
+++ b/lib/syntax_tree/rbs/version.rb
@@ -2,6 +2,6 @@
 
 module SyntaxTree
   module RBS
-    VERSION = "0.5.0"
+    VERSION = "0.5.1"
   end
 end