--- sidekiq.gemspec.orig	2020-06-21 17:11:53 UTC
+++ sidekiq.gemspec
@@ -23,7 +23,7 @@ Gem::Specification.new do |s|
     s.specification_version = 4
 
     if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
-      s.add_runtime_dependency(%q<redis>.freeze, [">= 3.3.5", "< 4.2"])
+      s.add_runtime_dependency(%q<redis>.freeze, [">= 3.3.5", "< 5"])
       s.add_runtime_dependency(%q<connection_pool>.freeze, ["~> 2.2", ">= 2.2.2"])
       s.add_runtime_dependency(%q<rack>.freeze, ["~> 2.0"])
       s.add_runtime_dependency(%q<rack-protection>.freeze, [">= 1.5.0"])