diff --git a/Gemfile b/Gemfile
index c59ccbe1a..b0859bca5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,6 +2,8 @@ source 'https://rubygems.org'
 
 gemspec
 
+gem "base64"
+gem "bigdecimal"
 gem "rake"
 gem "rake-compiler"
 gem "test-unit", "~> 3.0"