diff --git a/Gemfile.lock b/Gemfile.lock
index f8ca898e9..9f655bea1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -230,9 +230,12 @@ GEM
       concurrent-ruby (~> 1.0)
     i18n_data (0.17.1)
       simple_po_parser (~> 1.1)
-    icalendar (2.9.0)
+    icalendar (2.12.2)
+      base64
       ice_cube (~> 0.16)
-    ice_cube (0.16.4)
+      logger
+      ostruct
+    ice_cube (0.17.0)
     io-console (0.8.2)
     irb (1.15.2)
       pp (>= 0.6.0)