diff --git a/Gemfile.lock b/Gemfile.lock
index d8a4ffa..cdaf023 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,27 +2,28 @@ PATH
   remote: .
   specs:
     petra_core (0.0.5)
-      activesupport (>= 4.2, <= 5.2)
+      activesupport (>= 4.2, <= 7.1)
       method_source (~> 0.9.0)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (4.2.10)
-      i18n (~> 0.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
-      tzinfo (~> 1.1)
+    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)
     ast (2.4.0)
     coderay (1.1.2)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.10)
     diff-lcs (1.3)
     faker (1.8.7)
       i18n (>= 0.7)
-    i18n (0.9.5)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     method_source (0.9.0)
-    minitest (5.11.3)
+    minitest (5.15.0)
     parallel (1.12.1)
     parser (2.5.0.2)
       ast (~> 2.4.0)
@@ -53,10 +54,10 @@ GEM
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
     ruby-progressbar (1.9.0)
-    thread_safe (0.3.6)
-    tzinfo (1.2.5)
-      thread_safe (~> 0.1)
+    tzinfo (2.0.5)
+      concurrent-ruby (~> 1.0)
     unicode-display_width (1.3.0)
+    zeitwerk (2.6.6)
 
 PLATFORMS
   ruby
diff --git a/petra.gemspec b/petra.gemspec
index bd18105..41cb0a8 100644
--- a/petra.gemspec
+++ b/petra.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '~> 2.5'
 
-  spec.add_dependency 'activesupport', '>= 4.2', '<= 5.2'
+  spec.add_dependency 'activesupport', '>= 4.2', '<= 7.1'
   spec.add_dependency 'method_source', '~> 0.9.0'
 
   spec.add_development_dependency 'bundler', '~> 1.16'