diff --git a/Gemfile.lock b/Gemfile.lock
index 6c28cee..71873b3 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,7 +6,7 @@ PATH
       activesupport (>= 5.2)
       connection_pool (>= 2)
       msgpack (>= 0.5)
-      redis (>= 3.0)
+      redis (>= 3.0, < 4.7)
 
 GEM
   remote: https://rubygems.org/
diff --git a/modis.gemspec b/modis.gemspec
index d9f87b6..cb0a66a 100644
--- a/modis.gemspec
+++ b/modis.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |gem|
 
   gem.add_runtime_dependency 'activemodel', '>= 5.2'
   gem.add_runtime_dependency 'activesupport', '>= 5.2'
-  gem.add_runtime_dependency 'redis', '>= 3.0'
+  gem.add_runtime_dependency 'redis', '>= 3.0', '< 4.7'
   gem.add_runtime_dependency 'connection_pool', '>= 2'
 
   if defined? JRUBY_VERSION