diff --git a/unleash-client.gemspec b/unleash-client.gemspec
index caa4140..cb23ebe 100644
--- a/unleash-client.gemspec
+++ b/unleash-client.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "yggdrasil-engine", "~> 1.0.4"
 
-  spec.add_dependency "base64", "~> 0.2.0"
+  spec.add_dependency "base64", "~> 0.3.0"
   spec.add_dependency "logger", "~> 1.6"
 
   spec.add_development_dependency "bundler", "~> 2.1"