diff --git a/Gemfile b/Gemfile
index 82f2759..28c2e9b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'http://rubygems.org'
 
-gem 'activesupport', '~> 3.2'
+gem 'activesupport', '~> 6.1'
 gem 'pygments.rb', '~> 0.5'
 gem 'io-console', '~> 0.3' if RUBY_VERSION < '1.9.3'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 8e4e44b..2a78d33 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,20 +1,28 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    activesupport (3.2.8)
-      i18n (~> 0.6)
-      multi_json (~> 1.0)
-    i18n (0.6.1)
-    multi_json (1.3.6)
+    activesupport (6.1.7.1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
+    concurrent-ruby (1.1.10)
+    i18n (1.12.0)
+      concurrent-ruby (~> 1.0)
+    minitest (5.17.0)
     posix-spawn (0.3.6)
     pygments.rb (0.5.2)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.1.0)
+    tzinfo (2.0.5)
+      concurrent-ruby (~> 1.0)
     yajl-ruby (1.1.0)
+    zeitwerk (2.6.6)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  activesupport (~> 3.2)
+  activesupport (~> 6.1)
   pygments.rb (~> 0.5)