diff --git a/Gemfile.lock b/Gemfile.lock
index 050e8a6..a207162 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,15 +2,27 @@ PATH
   remote: .
   specs:
     sluggable_finder (2.3.5)
-      activerecord (<= 2.8.0)
+      activerecord (<= 6.1.0)
 
 GEM
   remote: http://rubygems.org/
   specs:
-    activerecord (2.3.18)
-      activesupport (= 2.3.18)
-    activesupport (2.3.18)
+    activemodel (6.0.0)
+      activesupport (= 6.0.0)
+    activerecord (6.0.0)
+      activemodel (= 6.0.0)
+      activesupport (= 6.0.0)
+    activesupport (6.0.0)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+      zeitwerk (~> 2.1, >= 2.1.8)
+    concurrent-ruby (1.1.5)
     diff-lcs (1.1.2)
+    i18n (1.7.0)
+      concurrent-ruby (~> 1.0)
+    minitest (5.12.2)
     rake (0.8.7)
     rspec (2.6.0)
       rspec-core (~> 2.6.0)
@@ -21,6 +33,10 @@ GEM
       diff-lcs (~> 1.1.2)
     rspec-mocks (2.6.0)
     sqlite3 (1.3.3)
+    thread_safe (0.3.6)
+    tzinfo (1.2.5)
+      thread_safe (~> 0.1)
+    zeitwerk (2.2.0)
 
 PLATFORMS
   ruby
diff --git a/sluggable_finder.gemspec b/sluggable_finder.gemspec
index e452b0b..39ffa19 100644
--- a/sluggable_finder.gemspec
+++ b/sluggable_finder.gemspec
@@ -18,7 +18,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "rspec"
   s.add_development_dependency 'rake'
   s.add_development_dependency 'sqlite3'
-  s.add_dependency 'activerecord', "<= 2.8.0"
+  s.add_dependency 'activerecord', "<= 6.1.0"
 
   s.files        = `git ls-files`.split("\n")
   s.executables  = `git ls-files`.split("\n").map{|f| f =~ /^bin\/(.*)/ ? $1 : nil}.compact