diff --git a/activeadmin_quill_editor.gemspec b/activeadmin_quill_editor.gemspec
index 561871d..0790737 100644
--- a/activeadmin_quill_editor.gemspec
+++ b/activeadmin_quill_editor.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |spec|
   spec.files         = Dir['{app,lib}/**/*', 'LICENSE.txt', 'Rakefile', 'README.md']
   spec.require_paths = ['lib']
 
-  spec.add_runtime_dependency 'activeadmin', '~> 2.0'
+  spec.add_runtime_dependency 'activeadmin', '>= 2.0', '< 4'
 
   spec.add_development_dependency 'appraisal', '~> 2.4'
 end
diff --git a/gemfiles/rails52_activeadmin20.gemfile.lock b/gemfiles/rails52_activeadmin20.gemfile.lock
index 962db24..7b1ff9d 100644
--- a/gemfiles/rails52_activeadmin20.gemfile.lock
+++ b/gemfiles/rails52_activeadmin20.gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: ..
   specs:
     activeadmin_quill_editor (1.0.0)
-      activeadmin (~> 2.0)
+      activeadmin (>= 2.0, < 4)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/rails60_activeadmin.gemfile.lock b/gemfiles/rails60_activeadmin.gemfile.lock
index 956104a..032446e 100644
--- a/gemfiles/rails60_activeadmin.gemfile.lock
+++ b/gemfiles/rails60_activeadmin.gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: ..
   specs:
     activeadmin_quill_editor (1.0.0)
-      activeadmin (~> 2.0)
+      activeadmin (>= 2.0, < 4)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/rails60_activeadmin22.gemfile.lock b/gemfiles/rails60_activeadmin22.gemfile.lock
index 33b0dbe..a42c22b 100644
--- a/gemfiles/rails60_activeadmin22.gemfile.lock
+++ b/gemfiles/rails60_activeadmin22.gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: ..
   specs:
     activeadmin_quill_editor (1.0.0)
-      activeadmin (~> 2.0)
+      activeadmin (>= 2.0, < 4)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/rails61_activeadmin.gemfile.lock b/gemfiles/rails61_activeadmin.gemfile.lock
index 492cc08..b32c404 100644
--- a/gemfiles/rails61_activeadmin.gemfile.lock
+++ b/gemfiles/rails61_activeadmin.gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: ..
   specs:
     activeadmin_quill_editor (1.0.0)
-      activeadmin (~> 2.0)
+      activeadmin (>= 2.0, < 4)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/rails61_activeadmin29.gemfile.lock b/gemfiles/rails61_activeadmin29.gemfile.lock
index 9e6e9dd..2fc7ae9 100644
--- a/gemfiles/rails61_activeadmin29.gemfile.lock
+++ b/gemfiles/rails61_activeadmin29.gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: ..
   specs:
     activeadmin_quill_editor (1.0.0)
-      activeadmin (~> 2.0)
+      activeadmin (>= 2.0, < 4)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/rails70_activeadmin.gemfile.lock b/gemfiles/rails70_activeadmin.gemfile.lock
index 20d8aba..a9304b3 100644
--- a/gemfiles/rails70_activeadmin.gemfile.lock
+++ b/gemfiles/rails70_activeadmin.gemfile.lock
@@ -2,7 +2,7 @@ PATH
   remote: ..
   specs:
     activeadmin_quill_editor (1.0.0)
-      activeadmin (~> 2.0)
+      activeadmin (>= 2.0, < 4)
 
 GEM
   remote: https://rubygems.org/