diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f057676..64de1e8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -49,7 +49,7 @@ jobs:
       - name: Run behavior tests
         run: bundle exec cucumber
       - name: Build gem
-        run: gem build --verbose *.gemspec
+        run: gem build --strict --verbose *.gemspec
   tests:
     needs:
       - rubocop
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index cf05d97..8b79d99 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -18,7 +18,7 @@ jobs:
         env:
           BUNDLE_WITHOUT: release
       - name: Build gem
-        run: gem build --verbose *.gemspec
+        run: gem build --strict --verbose *.gemspec
       - name: Publish gem to rubygems.org
         run: gem push *.gem
         env:
diff --git a/modulesync.gemspec b/modulesync.gemspec
index 5d5c1a0..3b6f1ab 100644
--- a/modulesync.gemspec
+++ b/modulesync.gemspec
@@ -19,10 +19,10 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_development_dependency 'aruba', '~>2.0'
-  spec.add_development_dependency 'cucumber'
-  spec.add_development_dependency 'rake'
-  spec.add_development_dependency 'rspec'
-  spec.add_development_dependency 'simplecov'
+  spec.add_development_dependency 'cucumber', '~> 9.2'
+  spec.add_development_dependency 'rake', '~> 13.2', '>= 13.2.1'
+  spec.add_development_dependency 'rspec', '~> 3.13'
+  spec.add_development_dependency 'simplecov', '~> 0.22.0'
   spec.add_development_dependency 'voxpupuli-rubocop', '~> 2.8.0'
 
   spec.add_runtime_dependency 'git', '~>1.7'