diff --git a/Gemfile b/Gemfile
index 5ea46fb..135ba3a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -47,7 +47,7 @@ gem "ruby_llm"
 gem "mcp-rb", require: "mcp"
 
 # iCal (.ics) file parsing and generation for calendar events
-gem "icalendar", "~> 2.10"
+gem "icalendar", "~> 2.12"
 
 group :development, :test do
   # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
diff --git a/Gemfile.lock b/Gemfile.lock
index f302ae8..98e3ee8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -138,7 +138,7 @@ GEM
       activesupport (>= 6.1)
     i18n (1.14.8)
       concurrent-ruby (~> 1.0)
-    icalendar (2.12.1)
+    icalendar (2.12.2)
       base64
       ice_cube (~> 0.16)
       logger
@@ -433,7 +433,7 @@ DEPENDENCIES
   bundler-audit
   capybara
   debug
-  icalendar (~> 2.10)
+  icalendar (~> 2.12)
   image_processing (~> 1.2)
   importmap-rails
   jbuilder