diff --git a/Gemfile.cucumber-5.3 b/Gemfile.cucumber-5.3
index 4fb15cd..1071890 100644
--- a/Gemfile.cucumber-5.3
+++ b/Gemfile.cucumber-5.3
@@ -2,6 +2,7 @@ source 'https://rubygems.org'
 
 # Former standard gems, see https://stdgems.org/
 gem 'ostruct' # Bundled gem since Ruby 3.4
+gem 'base64' # Bundled gem since Ruby 3.4
 
 # Runtime dependencies
 gem 'cucumber', '~> 5.3.0'