diff --git a/Gemfile b/Gemfile
index f82ec955..5c06f5cd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -43,6 +43,7 @@ gem 'rest-client'
 gem 'rubytree'
 gem 'rubyzip'
 gem 'sass-rails'
+gem 'sd_notify' # Watchdog service monitoring for systemd, automatically used by Puma if this gem is installed
 gem 'shakapacker', '6.5.4'
 gem 'slim-rails'
 gem 'sorcery' # Causes a deprecation warning in Rails 6.0+, see: https://github.com/Sorcery/sorcery/pull/255
diff --git a/Gemfile.lock b/Gemfile.lock
index 2354070a..e97995db 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -439,6 +439,7 @@ GEM
       sprockets (> 3.0)
       sprockets-rails
       tilt
+    sd_notify (0.1.1)
     selenium-webdriver (4.7.1)
       rexml (~> 3.2, >= 3.2.5)
       rubyzip (>= 1.2.2, < 3.0)
@@ -604,6 +605,7 @@ DEPENDENCIES
   rubytree
   rubyzip
   sass-rails
+  sd_notify
   selenium-webdriver
   sentry-rails
   sentry-ruby