diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 53d01d6..6eec073 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -9,7 +9,7 @@ jobs:
     name: Ruby ${{ matrix.version }}
     strategy:
       matrix:
-        version: [2.5.0, 2.7.1]
+        version: ['2.7', '3.0', '3.1', '3.2', '3.3']
 
     steps:
       - uses: actions/checkout@v2
diff --git a/.gitignore b/.gitignore
index 8fa63bc..088af20 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1 @@
 pkg/*
-Gemfile.lock
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..a603bb5
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+2.7.5
diff --git a/Gemfile.lock b/Gemfile.lock
new file mode 100644
index 0000000..119a259
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,100 @@
+GIT
+  remote: https://github.com/chrisk/fakeweb.git
+  revision: 2b08c1ff2714ec13a12f3497d67fcefce95c2cbe
+  specs:
+    fakeweb (1.3.0)
+
+PATH
+  remote: .
+  specs:
+    omniauth-shopify-oauth2 (2.4.0)
+      activesupport
+      omniauth-oauth2 (~> 1.5)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    activesupport (7.1.3.2)
+      base64
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      mutex_m
+      tzinfo (~> 2.0)
+    base64 (0.2.0)
+    bigdecimal (3.1.7)
+    concurrent-ruby (1.2.3)
+    connection_pool (2.4.1)
+    diff-lcs (1.5.1)
+    drb (2.2.1)
+    faraday (2.8.1)
+      base64
+      faraday-net_http (>= 2.0, < 3.1)
+      ruby2_keywords (>= 0.0.4)
+    faraday-net_http (3.0.2)
+    hashie (5.0.0)
+    i18n (1.14.4)
+      concurrent-ruby (~> 1.0)
+    jwt (2.8.1)
+      base64
+    minitest (5.22.3)
+    multi_xml (0.6.0)
+    mutex_m (0.2.0)
+    oauth2 (2.0.9)
+      faraday (>= 0.17.3, < 3.0)
+      jwt (>= 1.0, < 3.0)
+      multi_xml (~> 0.5)
+      rack (>= 1.2, < 4)
+      snaky_hash (~> 2.0)
+      version_gem (~> 1.1)
+    omniauth (2.1.2)
+      hashie (>= 3.4.6)
+      rack (>= 2.2.3)
+      rack-protection
+    omniauth-oauth2 (1.8.0)
+      oauth2 (>= 1.4, < 3)
+      omniauth (~> 2.0)
+    rack (3.0.10)
+    rack-protection (3.0.6)
+      rack
+    rack-session (2.0.0)
+      rack (>= 3.0.0)
+    rake (13.2.0)
+    rspec (3.9.0)
+      rspec-core (~> 3.9.0)
+      rspec-expectations (~> 3.9.0)
+      rspec-mocks (~> 3.9.0)
+    rspec-core (3.9.3)
+      rspec-support (~> 3.9.3)
+    rspec-expectations (3.9.4)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.9.0)
+    rspec-mocks (3.9.1)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.9.0)
+    rspec-support (3.9.4)
+    ruby2_keywords (0.0.5)
+    snaky_hash (2.0.1)
+      hashie
+      version_gem (~> 1.1, >= 1.1.1)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    version_gem (1.1.4)
+
+PLATFORMS
+  arm64-darwin-21
+  x86_64-linux
+
+DEPENDENCIES
+  fakeweb!
+  minitest (~> 5.6)
+  omniauth-shopify-oauth2!
+  rack-session (~> 2.0)
+  rake
+  rspec (~> 3.9.0)
+
+BUNDLED WITH
+   2.4.18
diff --git a/omniauth-shopify-oauth2.gemspec b/omniauth-shopify-oauth2.gemspec
index f589b88..461f7bd 100644
--- a/omniauth-shopify-oauth2.gemspec
+++ b/omniauth-shopify-oauth2.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |s|
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
   s.executables   = `git ls-files -- bin/*`.split("\n").map { |f| File.basename(f) }
   s.require_paths = ['lib']
-  s.required_ruby_version = '>= 2.1.9'
+  s.required_ruby_version = '>= 2.7'
 
   s.add_runtime_dependency 'omniauth-oauth2', '~> 1.5'
   s.add_runtime_dependency 'activesupport'