diff --git a/Gemfile b/Gemfile
index bd78a23f0..f390f4f4e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -19,3 +19,4 @@ gem "standard", "~> 1.24"
 gem "paint", "~> 2.3"
 gem "listen", "~> 3.0"
 gem "test-cmd.rb"
+gem "rexml", "~> 3.3.3"