diff --git a/Gemfile b/Gemfile
index c4d4b6b..4ec032c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,6 +10,10 @@ group :development, :test do
   gem "rubocop", ">= 0.43"
 end
 
+group :development do
+  gem "bump"
+end
+
 group :test do
   gem "coveralls", "~>0.8", require: false
   gem "simplecov", "~>0.10", require: false