diff --git a/Gemfile.lock b/Gemfile.lock
index 39550ea..e7ccc43 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,30 +2,29 @@ PATH
   remote: .
   specs:
     carrierwave-activerecord (0.3.0)
-      activerecord (~> 5.0)
+      activerecord (>= 5, < 7)
       carrierwave (~> 1.0.0)
 
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
-    activemodel (5.0.2)
-      activesupport (= 5.0.2)
-    activerecord (5.0.2)
-      activemodel (= 5.0.2)
-      activesupport (= 5.0.2)
-      arel (~> 7.0)
-    activesupport (5.0.2)
+    activemodel (6.1.3)
+      activesupport (= 6.1.3)
+    activerecord (6.1.3)
+      activemodel (= 6.1.3)
+      activesupport (= 6.1.3)
+    activesupport (6.1.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (~> 0.7)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
-    arel (7.1.4)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
     carrierwave (1.0.0)
       activemodel (>= 4.0.0)
       activesupport (>= 4.0.0)
       mime-types (>= 1.16)
     coderay (1.1.1)
-    concurrent-ruby (1.0.5)
+    concurrent-ruby (1.1.8)
     diff-lcs (1.1.3)
     docile (1.1.5)
     ffi (1.9.18)
@@ -42,7 +41,8 @@ GEM
     guard-rspec (2.5.4)
       guard (>= 1.1)
       rspec (~> 2.11)
-    i18n (0.8.1)
+    i18n (1.8.9)
+      concurrent-ruby (~> 1.0)
     json (2.0.3)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -50,10 +50,10 @@ GEM
       ruby_dep (~> 1.2)
     lumberjack (1.0.11)
     method_source (0.8.2)
-    mime-types (3.1)
+    mime-types (3.3.1)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
-    minitest (5.10.1)
+    mime-types-data (3.2021.0225)
+    minitest (5.14.4)
     nenv (0.3.0)
     notiffany (0.1.1)
       nenv (~> 0.1)
@@ -85,9 +85,9 @@ GEM
     slop (3.6.0)
     sqlite3 (1.3.13)
     thor (0.19.4)
-    thread_safe (0.3.6)
-    tzinfo (1.2.3)
-      thread_safe (~> 0.1)
+    tzinfo (2.0.4)
+      concurrent-ruby (~> 1.0)
+    zeitwerk (2.4.2)
 
 PLATFORMS
   ruby
diff --git a/carrierwave-activerecord.gemspec b/carrierwave-activerecord.gemspec
index 8f70f8e..6e1dc28 100644
--- a/carrierwave-activerecord.gemspec
+++ b/carrierwave-activerecord.gemspec
@@ -41,7 +41,7 @@ Gem::Specification.new do |gem|
   gem.add_runtime_dependency 'carrierwave', '~> 1.0.0'
 
   # ActiveRecord 3.3 is unlikely, but prevent it just in case.
-  gem.add_runtime_dependency 'activerecord', '~> 5.0'
+  gem.add_runtime_dependency 'activerecord', '>= 5', '< 7'
 
   gem.add_development_dependency 'sqlite3', '~> 1.3.0'
   gem.add_development_dependency 'rspec', '~> 2.12.0'