diff --git a/Gemfile b/Gemfile
index 1e18d5725cd..174ed2b12d4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -113,6 +113,7 @@ gem "date_validator", "~> 0.12.0"
 gem "email_validator", "~> 2.2.3"
 gem "json_schemer", "~> 2.5.0"
 gem "ruby-duration", "~> 3.2.0"
+gem "msgpack", "~> 1.8.0"
 
 gem "mail", "2.9.0"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index c3fa820df39..6a3d29c4b6b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1661,6 +1661,7 @@ DEPENDENCIES
   md_to_pdf!
   meta-tags (~> 2.23.0)
   mini_magick (~> 5.3.0)
+  msgpack (~> 1.8.0)
   multi_json (~> 1.20.0)
   my_page!
   net-ldap (~> 0.20.0)
diff --git a/lib_static/open_project/configuration.rb b/lib_static/open_project/configuration.rb
index d2a6ec56618..e9936c9f001 100644
--- a/lib_static/open_project/configuration.rb
+++ b/lib_static/open_project/configuration.rb
@@ -30,6 +30,7 @@
 
 require_relative "configuration/helpers"
 require_relative "configuration/asset_host"
+require "active_support/message_pack"
 
 module OpenProject
   module Configuration