diff --git a/ejson_wrapper.gemspec b/ejson_wrapper.gemspec
index 279052b..4e5e52e 100644
--- a/ejson_wrapper.gemspec
+++ b/ejson_wrapper.gemspec
@@ -29,4 +29,5 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "ejson"
   spec.add_dependency "aws-sdk-kms"
+  spec.add_dependency "base64"
 end
diff --git a/lib/ejson_wrapper/version.rb b/lib/ejson_wrapper/version.rb
index e4e9f03..a3ea66c 100644
--- a/lib/ejson_wrapper/version.rb
+++ b/lib/ejson_wrapper/version.rb
@@ -1,3 +1,3 @@
 module EjsonWrapper
-  VERSION = "0.4.1"
+  VERSION = "0.5.0"
 end