diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 562f460..c67b2c5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -9,7 +9,9 @@ jobs:
           - "2.6"
           - "2.7"
           - "3.0"
+          - "3.1"
           - "jruby-9.3.10.0"
+          - "jruby-9.4.1.0"
     steps:
       - uses: actions/checkout@v3
       - uses: ruby/setup-ruby@v1
diff --git a/.ruby-version b/.ruby-version
index eca690e..ff365e0 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-3.0.5
+3.1.3
diff --git a/candy_check.gemspec b/candy_check.gemspec
index 7942741..c866a47 100644
--- a/candy_check.gemspec
+++ b/candy_check.gemspec
@@ -20,9 +20,9 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = Gem::Requirement.new(">= 2.6")
 
-  spec.add_dependency "google-apis-androidpublisher_v3", "~> 0.2.0"
-  spec.add_dependency "googleauth", "~> 0.16"
-  spec.add_dependency "multi_json", "~> 1.10"
+  spec.add_dependency "google-apis-androidpublisher_v3", "~> 0.25.0"
+  spec.add_dependency "googleauth", "~> 1.2.0"
+  spec.add_dependency "multi_json", "~> 1.15"
   spec.add_dependency "thor", "< 2.0"
 
   spec.add_development_dependency "bundler", "~> 2.0"
diff --git a/spec/app_store/receipt_collection_spec.rb b/spec/app_store/receipt_collection_spec.rb
index b96d696..624a3ea 100644
--- a/spec/app_store/receipt_collection_spec.rb
+++ b/spec/app_store/receipt_collection_spec.rb
@@ -28,7 +28,7 @@
 
     it 'has positive overdue days' do
       overdue = subject.overdue_days
-      _(overdue).must_be_instance_of Fixnum
+      _(overdue).must_be_instance_of Integer
       assert overdue > 0
     end