diff --git a/.github/workflows/specs.yml b/.github/workflows/specs.yml
index e2ca7323..06f38d16 100644
--- a/.github/workflows/specs.yml
+++ b/.github/workflows/specs.yml
@@ -11,26 +11,18 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        ruby-version:
-          - "2.3"
-          - "2.4"
-          - "2.5"
-          - "2.6"
-          - "2.7"
-          - "3.0"
-          - "3.1"
-          - "3.2"
+        ruby: ['2.3', '2.4', '2.5', '2.6', '2.7', '3.0', '3.1', '3.2', '3.3', '3.4']
         exclude:
-          - ruby-version: "2.3" # Rugged uses the wrong openssl version on CI and segfaults (similar to https://github.com/libgit2/rugged/issues/718)
+          - ruby: "2.3" # Rugged uses the wrong openssl version on CI and segfaults (similar to https://github.com/libgit2/rugged/issues/718)
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Use specific gitlab gem version (if required)
-        if: matrix.ruby-version == '2.4'
+        if: matrix.ruby == '2.4'
         run: echo "gem 'gitlab', '< 4.14.1'" >> Gemfile.local
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: ${{ matrix.ruby-version }}
+          ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
       - name: Test & publish code coverage
         uses: paambaati/codeclimate-action@7bcf9e73c0ee77d178e72c0ec69f1a99c1afc1f3 # v2.7.5
diff --git a/pronto.gemspec b/pronto.gemspec
index 0d27c9af..b1a2dbba 100644
--- a/pronto.gemspec
+++ b/pronto.gemspec
@@ -46,6 +46,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency('rexml', '>= 3.2.5', '< 4.0')
   s.add_runtime_dependency('rugged', '>= 0.23.0', '< 2.0')
   s.add_runtime_dependency('thor', '>= 0.20.3', '< 2.0')
+  s.add_development_dependency('base64', '~> 0.1.2')
   s.add_development_dependency('bundler', '>= 1.15')
   s.add_development_dependency('pronto-rubocop', '~> 0.10.0')
   s.add_development_dependency('rake', '~> 12.0')