diff --git a/Gemfile b/Gemfile
index 4dd3a16..55b6cd7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ gem "jekyll", "~> 4.4.1"
 gem 'jekyll-sqlite'
 gem 'jekyll-sitemap'
 gem "jekyll-datapage-generator", "~> 1.4"
-gem "icalendar", "~> 2.10"
+gem "icalendar", "~> 2.12"
 
 gem "csv", "~> 3.3"
 gem "base64", "~> 0.2.0"
diff --git a/Gemfile.lock b/Gemfile.lock
index 6f37113..c35c08b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -54,7 +54,7 @@ GEM
     http_parser.rb (0.8.0)
     i18n (1.14.7)
       concurrent-ruby (~> 1.0)
-    icalendar (2.11.2)
+    icalendar (2.12.1)
       base64
       ice_cube (~> 0.16)
       logger
@@ -213,7 +213,7 @@ PLATFORMS
 DEPENDENCIES
   base64 (~> 0.2.0)
   csv (~> 3.3)
-  icalendar (~> 2.10)
+  icalendar (~> 2.12)
   jekyll (~> 4.4.1)
   jekyll-datapage-generator (~> 1.4)
   jekyll-sitemap