diff --git a/Gemfile.lock b/Gemfile.lock
index c2fb737..13c5c91 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,24 +2,29 @@ GEM
   remote: http://rubygems.org/
   specs:
     Ascii85 (1.0.2)
-    activesupport (3.2.10)
-      i18n (~> 0.6)
-      multi_json (~> 1.0)
+    activesupport (6.1.7.3)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
     afm (0.2.0)
     appraisal (0.5.1)
       bundler
       rake
+    concurrent-ruby (1.2.2)
     diff-lcs (1.1.3)
     git (1.2.5)
     hashery (2.1.0)
-    i18n (0.6.1)
+    i18n (1.12.0)
+      concurrent-ruby (~> 1.0)
     jeweler (1.8.4)
       bundler (~> 1.0)
       git (>= 1.2.5)
       rake
       rdoc
     json (1.8.3)
-    multi_json (1.5.0)
+    minitest (5.18.0)
     pdf-reader (1.3.0)
       Ascii85 (~> 1.0.0)
       afm (~> 0.2.0)
@@ -42,6 +47,9 @@ GEM
     rspec-mocks (2.12.1)
     ruby-rc4 (0.1.5)
     ttfunk (1.0.3)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    zeitwerk (2.6.7)
 
 PLATFORMS
   ruby