diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9d7fe69..56f5d38 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,6 +16,7 @@ jobs:
       fail-fast: false
       matrix:
         ruby-version: ['3.1', '3.2', '3.3', '3.4']
+        gemfile: ['gemfiles/rails_6.gemfile', 'gemfiles/rails_7.gemfile']
     steps:
     - uses: actions/checkout@v4
     - name: Set up Ruby
diff --git a/acts_as_textcaptcha.gemspec b/acts_as_textcaptcha.gemspec
index f39fb5f..926958d 100644
--- a/acts_as_textcaptcha.gemspec
+++ b/acts_as_textcaptcha.gemspec
@@ -49,8 +49,8 @@ Gem::Specification.new do |spec|
 
   # testing
   spec.add_development_dependency("appraisal")
-  spec.add_development_dependency("rails")
+  spec.add_development_dependency("rails", "~> 6.1")
   spec.add_development_dependency("minitest")
-  spec.add_development_dependency("sqlite3")
+  spec.add_development_dependency("sqlite3", "~> 1.4")
   spec.add_development_dependency("webmock")
 end