diff --git a/Gemfile b/Gemfile
index ea229ede5d..10915547ec 100644
--- a/Gemfile
+++ b/Gemfile
@@ -98,7 +98,7 @@ gem 'fancybox-rails', '~> 0.3.0'
 gem 'friendly_id', '~> 5.5.1'
 gem 'gnuplot', '~> 2.6.0'
 gem 'htmlentities', '~> 4.3.0'
-gem 'icalendar', '~> 2.10.2'
+gem 'icalendar', '~> 2.10.3'
 gem 'jquery-rails', '~> 4.6.0'
 gem 'jquery-ui-rails', '~> 6.0.0'
 gem 'json', '~> 2.7.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index 13083948f8..a41e722bc5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -292,8 +292,9 @@ GEM
     httpclient (2.8.3)
     i18n (1.14.6)
       concurrent-ruby (~> 1.0)
-    icalendar (2.10.2)
+    icalendar (2.10.3)
       ice_cube (~> 0.16)
+      ostruct
     ice_cube (0.17.0)
     importmap-rails (2.0.1)
       actionpack (>= 6.0.0)
@@ -378,6 +379,7 @@ GEM
       hodel_3000_compliant_logger
     open4 (1.3.4)
     os (1.1.4)
+    ostruct (0.6.0)
     parallel (1.26.3)
     parser (3.3.5.0)
       ast (~> 2.4.1)
@@ -617,7 +619,7 @@ DEPENDENCIES
   holidays (~> 8.8.0)
   htmlentities (~> 4.3.0)
   i18n (~> 1.14.6)
-  icalendar (~> 2.10.2)
+  icalendar (~> 2.10.3)
   importmap-rails (~> 2.0.1)
   iso_country_codes (~> 0.7.8)
   jquery-rails (~> 4.6.0)