diff --git a/tools/appliance/Gemfile b/tools/appliance/Gemfile
index acd771b6ac7..8930c3b06da 100644
--- a/tools/appliance/Gemfile
+++ b/tools/appliance/Gemfile
@@ -22,3 +22,4 @@ gem 'em-winrm'
 gem 'sys-proctable'
 gem 'net-scp'
 gem 'net-ssh'
+gem 'progressbar', '0.21.0'