diff --git a/Gemfile.lock b/Gemfile.lock
index deee5c6..f076a5c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,19 +6,20 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.3)
+    activesupport (6.0.3.4)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    concurrent-ruby (1.1.5)
+      zeitwerk (~> 2.2, >= 2.2.2)
+    concurrent-ruby (1.1.7)
     diff-lcs (1.3)
     ethon (0.12.0)
       ffi (>= 1.3.0)
     ffi (1.11.1)
-    i18n (1.7.0)
+    i18n (1.8.5)
       concurrent-ruby (~> 1.0)
-    minitest (5.13.0)
+    minitest (5.14.2)
     rake (13.0.1)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
@@ -36,14 +37,15 @@ GEM
     thread_safe (0.3.6)
     typhoeus (1.3.1)
       ethon (>= 0.9.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.8)
       thread_safe (~> 0.1)
+    zeitwerk (2.4.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  activesupport (~> 5.0)
+  activesupport (~> 6.0)
   bundler (~> 2.0)
   gcore_api_rb!
   rake (~> 13.0)
diff --git a/gcore_api_rb.gemspec b/gcore_api_rb.gemspec
index de2c109..ba64151 100644
--- a/gcore_api_rb.gemspec
+++ b/gcore_api_rb.gemspec
@@ -28,7 +28,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_development_dependency "activesupport", "~> 5.0"
+  spec.add_development_dependency "activesupport", "~> 6.0"
   spec.add_development_dependency "bundler", "~> 2.0"
   spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "rspec", "~> 3.0"