diff --git a/.github/workflows/rspec.yaml b/.github/workflows/rspec.yaml
index 85d6d3f..86b73c0 100644
--- a/.github/workflows/rspec.yaml
+++ b/.github/workflows/rspec.yaml
@@ -6,7 +6,7 @@ jobs:
   rspec:
     runs-on: ubuntu-latest
     container:
-      image: ruby:3.0.6
+      image: ruby:3.1.6
     env:
       BUNDLER_VERSION: "2.5.23"
 
diff --git a/.gitignore b/.gitignore
index 01338f7..779aec9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,6 +30,7 @@ mkmf.log
 # tmp files and logs
 /log/*
 /tmp/*
+/*.gem
 
 # various artifacts
 **.war
diff --git a/.ruby-version b/.ruby-version
index 818bd47..9cec716 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.0.6
+3.1.6
diff --git a/README.md b/README.md
index 1b54e90..570b6ab 100644
--- a/README.md
+++ b/README.md
@@ -24,15 +24,16 @@ Or install it yourself as:
 
 ## Dependencies
 
-Currently this gem is built & tested with Ruby 2.3.x.
-Confirmed working with Ruby 2.4.x.
+This gem is built and tested with Ruby 3.1.x.
 
-Requires Ruby >= 2.3
+Requires Ruby >= 3.1.0
 
 ```ruby
-"faraday", "~> 0.13.1"
-"faraday_middleware", "~> 0.12.2"
-"virtus", "~> 1.0"
+"activesupport", "~> 6.1"
+"faraday", "~> 2"
+"faraday-follow_redirects", "~> 0.3"
+"faraday-multipart", "~> 1.1"
+"virtus", "~> 2.0"
 ```
 
 ## Usage
diff --git a/qualtrics_api.gemspec b/qualtrics_api.gemspec
index c30056d..a5ee7b2 100644
--- a/qualtrics_api.gemspec
+++ b/qualtrics_api.gemspec
@@ -1,4 +1,3 @@
-# coding: utf-8
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 
@@ -15,18 +14,18 @@ Gem::Specification.new do |spec|
   spec.homepage      = "https://github.com/CambridgeEducation/qualtrics_api"
   spec.license       = "MIT"
 
-  spec.files         = `git ls-files -z`.split("\x0")
+  spec.files         = `git ls-files -z`.split("\x0").reject { |file| file.end_with?(".gem") }
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.required_ruby_version = ">= 3.0.6"
+  spec.required_ruby_version = ">= 3.1.0"
 
   spec.add_dependency "activesupport", "~> 6.1"
   spec.add_dependency "faraday", "~> 2"
   spec.add_dependency "faraday-follow_redirects", "~> 0.3"
   spec.add_dependency "faraday-multipart", "~> 1.1"
-  spec.add_dependency "virtus", ">= 1.0"
+  spec.add_dependency "virtus", "~> 2.0"
 
   spec.add_development_dependency "bundler", "~> 2.5.23"
   spec.add_development_dependency "rake", "~> 12.3"