diff --git a/Gemfile b/Gemfile
index 53ad3f7952d2f0f9102c02c3d89ee3d9c3d529e0..c46b48932d4112dbef865547036714a567d72557 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,9 +3,12 @@
 source "https://rubygems.org"
 gem "amazing_print"
 gem "blather", git: "https://github.com/adhearsion/blather.git", branch: "develop"
+gem "dhall"
+gem "em-hiredis"
 gem "em-http-request", git: "https://github.com/singpolyma/em-http-request", branch: "fix-letsencrypt"
 gem "em_promise.rb"
 gem "ougai"
 gem "savon"
+gem "sentry-ruby", "<= 4.3.1"
 
 gem "rubocop"