diff --git a/CHANGELOG.md b/CHANGELOG.md
index ce728d145..48d554a80 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## Unreleased
+
+- Fix warning about default gems on Ruby 3.3.0 ([#2225](https://github.com/getsentry/sentry-ruby/pull/2225))
+
 ## 5.16.1
 
 ### Bug Fixes
diff --git a/sentry-ruby/lib/sentry/transport.rb b/sentry-ruby/lib/sentry/transport.rb
index bab781ec1..1d4366a95 100644
--- a/sentry-ruby/lib/sentry/transport.rb
+++ b/sentry-ruby/lib/sentry/transport.rb
@@ -1,7 +1,6 @@
 # frozen_string_literal: true
 
 require "json"
-require "base64"
 require "sentry/envelope"
 
 module Sentry
diff --git a/sentry-ruby/sentry-ruby.gemspec b/sentry-ruby/sentry-ruby.gemspec
index 154d7638c..77e9711ec 100644
--- a/sentry-ruby/sentry-ruby.gemspec
+++ b/sentry-ruby/sentry-ruby.gemspec
@@ -21,4 +21,5 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency "concurrent-ruby", '~> 1.0', '>= 1.0.2'
+  spec.add_dependency "bigdecimal"
 end