diff --git a/Gemfile b/Gemfile
index 12c71f7e7..601d5e594 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ source 'https://rubygems.org'
 gem 'active_interaction', '~> 4.0'
 gem 'apipie-rails', '~> 0.5.18'
 gem 'bootsnap', '>= 1.1.0', require: false
-gem 'iso8601', '0.12.1' # for dates and times
+gem 'iso8601', '0.13.0' # for dates and times
 gem 'mime-types-data'
 gem 'mimemagic', '0.4.3'
 gem 'rails', '~>  6.1.3.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index 344e00e55..61c9535b1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -253,7 +253,7 @@ GEM
       concurrent-ruby (~> 1.0)
     i18n_data (0.11.0)
     isikukood (0.1.2)
-    iso8601 (0.12.1)
+    iso8601 (0.13.0)
     jmespath (1.4.0)
     jquery-rails (4.4.0)
       rails-dom-testing (>= 1, < 3)
@@ -541,7 +541,7 @@ DEPENDENCIES
   figaro (~> 1.2)
   haml (~> 5.0)
   isikukood
-  iso8601 (= 0.12.1)
+  iso8601 (= 0.13.0)
   jquery-rails
   jquery-ui-rails (= 6.0.1)
   kaminari