diff --git a/Gemfile.lock b/Gemfile.lock
index 59f0f1cf..d783c379 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     devise_security_extension (0.10.0)
       devise (>= 3.0.0, < 5.0)
-      railties (~> 6.0.3, >= 3.2.6)
+      railties (>= 3.2.6, <= 6.0.3.4)
 
 GEM
   remote: https://rubygems.org/
diff --git a/devise_security_extension.gemspec b/devise_security_extension.gemspec
index 3595ca22..1f03f2a2 100644
--- a/devise_security_extension.gemspec
+++ b/devise_security_extension.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
   s.require_paths = ['lib']
   s.required_ruby_version = '>= 2.1.0'
 
-  s.add_runtime_dependency 'railties', '~> 6.0.3', '>= 3.2.6'
+  s.add_runtime_dependency 'railties', '>= 3.2.6', '<= 6.0.3.4'
   s.add_runtime_dependency 'devise', '>= 3.0.0', '< 5.0'
   s.add_development_dependency 'bundler', '>= 1.3.0', '< 2.0'
   s.add_development_dependency 'sqlite3', '~> 1.3.10'