diff --git a/Gemfile b/Gemfile
index 5577dba84..a9c954ab2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,5 +5,6 @@ gem "webrick", "~> 1.7"
 
 gem 'logger', '~> 1.6', '>= 1.6.4'
 gem "csv", "~> 3.0"
+gem 'base64', '~> 0.2.0'
 
 gem "fractal", "~> 5", git: "https://github.com/MichaelCurrin/fractal"