diff --git a/Gemfile b/Gemfile
index bf85bb88afd5..ea1c9c15fdf3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -208,7 +208,7 @@ gem "appsignal", "~> 3.0", require: false
 
 gem 'view_component'
 # Lookbook
-gem 'lookbook', '~> 2.0.5'
+gem 'lookbook', '~> 2.1.0'
 
 # Require factory_bot for usage with openproject plugins testing
 gem 'factory_bot', '~> 6.2.0', require: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 882b2de02106..bc31ae2be0e4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -606,7 +606,7 @@ GEM
     loofah (2.21.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
-    lookbook (2.0.5)
+    lookbook (2.1.1)
       activemodel
       css_parser
       htmlbeautifier (~> 1.3)
@@ -1083,7 +1083,7 @@ DEPENDENCIES
   letter_opener
   listen (~> 3.8.0)
   lograge (~> 0.13.0)
-  lookbook (~> 2.0.5)
+  lookbook (~> 2.1.0)
   mail (= 2.8.1)
   matrix (~> 0.4.2)
   md_to_pdf!
diff --git a/lib/open_project/patches/lookbook_tree_node_inflector.rb b/lib/open_project/patches/lookbook_tree_node_inflector.rb
index dbbeda1ffc15..f95dbdb37211 100644
--- a/lib/open_project/patches/lookbook_tree_node_inflector.rb
+++ b/lib/open_project/patches/lookbook_tree_node_inflector.rb
@@ -41,7 +41,7 @@ def label
 end
 
 if Rails.env.development?
-  OpenProject::Patches.patch_gem_version 'lookbook', '2.0.5' do
+  OpenProject::Patches.patch_gem_version 'lookbook', '2.1.1' do
     Lookbook::TreeNode.prepend OpenProject::Patches::LookbookTreeNodeInflector
   end
 end