diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 33fb595..8b99eb2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: [3.1, 3.2]
+        ruby-version: [3.1, 3.2, 3.3]
 
     steps:
     - uses: actions/checkout@v3
diff --git a/.rubocop.yml b/.rubocop.yml
index ee870e0..b6689e1 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -14,6 +14,7 @@ Gemspec/RequiredRubyVersion:
   Include:
     - 3.1
     - 3.2
+    - 3.3
 
 Naming/FileName:
   Exclude:
diff --git a/.ruby-version b/.ruby-version
index ab96aa9..03463f3 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-ruby-3.2.3
+ruby-3.3.0
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b9486c9..11d8216 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # CHANGELOG
 
+## 3.3.1 - 2024-02-29
+- make ruby 3.1 a minimum version
+
 ## 3.3.0 - 2023-11-23
 
 - add `request_epilogue` so actions like `ActiveRecord::Base.connection_handler.clear_active_connections!` can be passed manually
diff --git a/Gemfile.lock b/Gemfile.lock
index e93a500..38b82a5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    rack-graphql (3.3.0)
+    rack-graphql (3.4.0)
       graphql (~> 2.0)
       oj
       rack (>= 2.2.6)
@@ -11,10 +11,12 @@ GEM
   specs:
     ast (2.4.2)
     awesome_print (1.9.2)
+    base64 (0.2.0)
     bigdecimal (3.1.6)
     coderay (1.1.3)
     diff-lcs (1.5.1)
-    graphql (2.2.7)
+    graphql (2.2.11)
+      base64
     json (2.7.1)
     language_server-protocol (3.17.0.3)
     method_source (1.0.0)
@@ -24,11 +26,12 @@ GEM
     parser (3.3.0.5)
       ast (~> 2.4.1)
       racc
+    prism (0.24.0)
     pry (0.14.2)
       coderay (~> 1.1)
       method_source (~> 1.0)
     racc (1.7.3)
-    rack (3.0.9)
+    rack (3.0.9.1)
     rack-test (2.1.0)
       rack (>= 1.3)
     rainbow (3.1.1)
@@ -47,8 +50,8 @@ GEM
     rspec-mocks (3.13.0)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
-    rspec-support (3.13.0)
-    rubocop (1.60.2)
+    rspec-support (3.13.1)
+    rubocop (1.61.0)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
@@ -59,8 +62,9 @@ GEM
       rubocop-ast (>= 1.30.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.30.0)
-      parser (>= 3.2.1.0)
+    rubocop-ast (1.31.0)
+      parser (>= 3.3.0.4)
+      prism (>= 0.24.0)
     rubocop-capybara (2.20.0)
       rubocop (~> 1.41)
     rubocop-factory_bot (2.25.1)
@@ -96,4 +100,4 @@ DEPENDENCIES
   rubocop-rspec
 
 BUNDLED WITH
-   2.5.5
+   2.5.6
diff --git a/lib/rack_graphql/version.rb b/lib/rack_graphql/version.rb
index bae400f..c7b86c6 100644
--- a/lib/rack_graphql/version.rb
+++ b/lib/rack_graphql/version.rb
@@ -1,3 +1,3 @@
 module RackGraphql
-  VERSION = '3.3.0'.freeze
+  VERSION = '3.4.0'.freeze
 end
diff --git a/rack-graphql.gemspec b/rack-graphql.gemspec
index 09e079d..af7bac7 100644
--- a/rack-graphql.gemspec
+++ b/rack-graphql.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |spec|
   spec.executables = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 3.1'
+  spec.required_ruby_version = Gem::Requirement.new('>= 3.1.0')
 
   spec.add_dependency 'graphql', '~> 2.0'
   spec.add_dependency 'oj'