diff --git a/rspec-sidekiq.gemspec b/rspec-sidekiq.gemspec
index 5c495f4..6df00f9 100644
--- a/rspec-sidekiq.gemspec
+++ b/rspec-sidekiq.gemspec
@@ -30,4 +30,6 @@ Gem::Specification.new do |s|
   s.files = `git ls-files -- lib/*`.split("\n")
   s.files += %w[CHANGES.md LICENSE README.md]
   s.require_paths = ["lib"]
+
+  s.required_ruby_version = ">= 2.7"
 end