diff --git a/landline.gemspec b/landline.gemspec
index 68e0311..b7e92c6 100644
--- a/landline.gemspec
+++ b/landline.gemspec
@@ -17,5 +17,5 @@ Gem::Specification.new do |spec|
   spec.extra_rdoc_files      = Dir["*.md"]
   spec.required_ruby_version = ">= 3.0.0"
 
-  spec.add_dependency 'base64', '~> 0.3.0'
+  spec.add_dependency 'base64', '~> 0', '>= 0.1.0'
 end
diff --git a/lib/landline/probe.rb b/lib/landline/probe.rb
index d19ddb6..dcafd6f 100644
--- a/lib/landline/probe.rb
+++ b/lib/landline/probe.rb
@@ -5,7 +5,6 @@ require_relative 'util/lookup'
 require_relative 'dsl/methods_probe'
 require_relative 'dsl/methods_common'
 require_relative 'dsl/constructors_probe'
-require 'pp'
 
 module Landline
   # All subclasses of Landline::Probe that respond to requests