diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..8d5176a
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,39 @@
+# This workflow runs continuous CI across different versions of ruby on all branches and pull requests to develop.
+
+name: CI
+on:
+  push:
+    branches: [ '**' ]
+  pull_request:
+    branches: [ develop ]
+  workflow_dispatch:
+
+jobs:
+  tests:
+    name: Ruby ${{ matrix.ruby }}
+    if: "contains(github.event.commits[0].message, '[ci skip]') == false"
+    runs-on: ubuntu-latest
+    env:
+      CI: true
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby:
+          - 2.4
+          - 2.5
+          - 2.6
+          - 2.7
+          - ruby-head
+          - jruby
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v2
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+      - name: Install dependencies
+        run: bundle install --jobs 4 --retry 3
+      - name: Run tests
+        run: bundle exec rspec spec
+ 
diff --git a/README.md b/README.md
index bc52540..1ed207b 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ An implementation of the JSON Canonicalization Scheme for Ruby
 Implements version 5 of [draft-rundgren-json-canonicalization-scheme-05](https://tools.ietf.org/html/draft-rundgren-json-canonicalization-scheme-05#page-5).
 
 [![Gem Version](https://badge.fury.io/rb/json-canonicalization.png)](http://badge.fury.io/rb/json-canonicalization)
-[![Build Status](https://travis-ci.org/dryruby/json-canonicalization.png?branch=master)](http://travis-ci.org/dryruby/json-canonicalization)
+[![Build Status](https://github.com/dryruby/json-canonicalization/workflows/CI/badge.svg?branch=develop)](https://github.com/dryruby/json-canonicalization/actions?query=workflow%3ACI)
 [![Coverage Status](https://coveralls.io/repos/dryruby/json-canonicalization/badge.svg)](https://coveralls.io/r/dryruby/json-canonicalization)
 
 # Description
@@ -84,10 +84,14 @@ Full documentation available on [RubyDoc](http://rubydoc.info/gems/json-canonica
   list in the the `README`. Alphabetical order applies.
 * Do note that in order for us to merge any non-trivial changes (as a rule
   of thumb, additions larger than about 15 lines of code), we need an
-  explicit [public domain dedication][PDD] on record from you.
+  explicit [public domain dedication][PDD] on record from you,
+  which you will be asked to agree to on the first commit to a repo within the organization.
 
-##License
+## License
 
 This is free and unencumbered public domain software. For more information,
 see <http://unlicense.org/> or the accompanying {file:UNLICENSE} file.
 
+[YARD]:           https://yardoc.org/
+[YARD-GS]:        https://rubydoc.info/docs/yard/file/docs/GettingStarted.md
+[PDD]:            https://unlicense.org/#unlicensing-contributions
diff --git a/VERSION b/VERSION
index 0ea3a94..0c62199 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.2.0
+0.2.1
diff --git a/json-canonicalization.gemspec b/json-canonicalization.gemspec
index efbb1e2..2ee4cf4 100755
--- a/json-canonicalization.gemspec
+++ b/json-canonicalization.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |gem|
 
   gem.required_ruby_version = '>= 2.4'
   gem.requirements          = []
-  gem.add_development_dependency 'rspec',           '~> 3.9'
+  gem.add_development_dependency 'rspec',           '~> 3.10'
   gem.add_development_dependency 'yard' ,           '~> 0.9'
 
   gem.post_install_message  = nil
diff --git a/lib/json/canonicalization.rb b/lib/json/canonicalization.rb
index 3967ae9..e972eaf 100644
--- a/lib/json/canonicalization.rb
+++ b/lib/json/canonicalization.rb
@@ -61,13 +61,21 @@ def to_json_c14n
   end
 end
 
+def encode_key(k)
+  case k
+  when String
+    return k.encode(Encoding::UTF_16)
+  end
+  k
+end
+
 class Hash
   # Output JSON with keys sorted lexicographically
   # @return [String]
   def to_json_c14n
     "{" + self.
       keys.
-      sort_by {|k| k.encode(Encoding::UTF_16)}.
+      sort_by {|k| encode_key(k)}.
       map {|k| k.to_json_c14n + ':' + self[k].to_json_c14n}
       .join(',') +
     '}'
@@ -81,3 +89,12 @@ def to_json_c14n
     self.to_json
   end
 end
+
+class Symbol
+  # Output JSON with control characters escaped
+  # @return [String]
+  def to_json_c14n
+    self.to_json
+  end
+end
+
diff --git a/spec/c14n_spec.rb b/spec/c14n_spec.rb
index 5c8df05..f677973 100644
--- a/spec/c14n_spec.rb
+++ b/spec/c14n_spec.rb
@@ -9,3 +9,10 @@
     end
   end
 end
+
+describe "special cases for hash keys" do
+    it "handles hash defined with symbols" do
+      data = { a: [{b:"b"}] }
+      expect(data.to_json_c14n).to eq "{\"a\":[{\"b\":\"b\"}]}"
+    end
+end