diff --git a/devise_token_auth.gemspec b/devise_token_auth.gemspec
index a77c00c76..387b64f25 100644
--- a/devise_token_auth.gemspec
+++ b/devise_token_auth.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
   s.test_files.reject! { |file| file.match(/[.log|.sqlite3]$/) }
 
   s.add_dependency "rails", "< 6"
-  s.add_dependency "devise", "> 3.5.2", "<= 4.2"
+  s.add_dependency "devise", "> 3.5.2", "<= 4.2.1"
 
   s.add_development_dependency "sqlite3", "~> 1.3"
   s.add_development_dependency 'pg'