diff --git a/CHANGELOG.md b/CHANGELOG.md
index ced5ec9..42cd94f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## [Unreleased]
 
+## [0.11.0] - 2026-10-14
+
+- Update various gems for CVE vulnerabilities
+
 ## [0.10.1] - 2025-11-21
 
 - Add support for Table of Contents
diff --git a/Gemfile b/Gemfile
index 2c80371..3efd6eb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,3 +8,4 @@ gemspec
 gem "rake", "~> 13.0"
 gem "rspec", "~> 3.0"
 gem "standard", "~> 1.3"
+gem "ostruct"
diff --git a/Gemfile.lock b/Gemfile.lock
index 7f47c76..793279b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -53,6 +53,7 @@ GEM
     nokogiri (1.19.4)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
+    ostruct (0.6.3)
     parallel (1.23.0)
     parser (3.2.2.4)
       ast (~> 2.4.1)
@@ -123,6 +124,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  ostruct
   rake (~> 13.0)
   rspec (~> 3.0)
   standard (~> 1.3)