diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7528a50..2d04ac8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,6 +24,11 @@ jobs:
           - ruby: '2.7'
             redis: '4'
             search: ['opensearch-ruby:1.0.1', 'opensearchproject/opensearch:1.0.1']
+          # Redis 5
+          # Will add support after fixing patch
+          # - ruby: '2.7'
+          #   redis: '5'
+          #   search: [['opensearch-ruby:2.1.0', 'opensearchproject/opensearch:2.2.1']]
           # Ruby 2.3 & Elasticsearch 7.13
           - ruby: '2.3'
             redis: '4'
diff --git a/lib/faulty/storage/redis.rb b/lib/faulty/storage/redis.rb
index bdd62c3..3b96c91 100644
--- a/lib/faulty/storage/redis.rb
+++ b/lib/faulty/storage/redis.rb
@@ -25,7 +25,7 @@ class Redis
       #     circuit state. Default `faulty`.
       # @!attribute [r] key_separator
       #   @return [String] A string used to separate the parts of the Redis keys
-      #     used to store circuit state. Defaulty `:`.
+      #     used to store circuit state. Default `:`.
       # @!attribute [r] max_sample_size
       #   @return [Integer] The number of cache run entries to keep in memory
       #     for each circuit. Default `100`.
@@ -122,7 +122,7 @@ def set_options(circuit, stored_options)
       def entry(circuit, time, success, status)
         key = entries_key(circuit.name)
         result = pipe do |r|
-          r.sadd(list_key, circuit.name)
+          r.call([:sadd, list_key, circuit.name])
           r.expire(list_key, options.circuit_ttl + options.list_granularity) if options.circuit_ttl
           r.lpush(key, "#{time}#{ENTRY_SEPARATOR}#{success ? 1 : 0}")
           r.ltrim(key, 0, options.max_sample_size - 1)
@@ -425,11 +425,16 @@ def check_client_options!
       end
 
       def check_redis_options!
-        ropts = redis { |r| r.instance_variable_get(:@client).options }
+        gte5 = ::Redis::VERSION.to_f >= 5
+        method = gte5 ? :config : :options
+        ropts = redis do |r|
+          r.instance_variable_get(:@client).public_send(method)
+        end
 
         bad_timeouts = {}
         %i[connect_timeout read_timeout write_timeout].each do |time_opt|
-          bad_timeouts[time_opt] = ropts[time_opt] if ropts[time_opt] > 2
+          value = gte5 ? ropts.public_send(time_opt) : ropts[time_opt]
+          bad_timeouts[time_opt] = value if value > 2
         end
 
         unless bad_timeouts.empty?
@@ -440,10 +445,11 @@ def check_redis_options!
           MSG
         end
 
-        if ropts[:reconnect_attempts] > 1
+        gt1_retry = gte5 ? ropts.retry_connecting?(1, nil) : ropts[:reconnect_attempts] > 1
+        if gt1_retry
           warn <<~MSG
             Faulty recommends setting Redis reconnect_attempts to <= 1 to
-            prevent cascading failures. Your setting is #{ropts[:reconnect_attempts]}
+            prevent cascading failures. Your setting is larger.
           MSG
         end
       end
diff --git a/spec/storage/redis_spec.rb b/spec/storage/redis_spec.rb
index b46d965..002dacd 100644
--- a/spec/storage/redis_spec.rb
+++ b/spec/storage/redis_spec.rb
@@ -54,7 +54,7 @@
   end
 
   context 'when Redis has high timeout' do
-    let(:client) { Redis.new(timeout: 5) }
+    let(:client) { Redis.new(timeout: 5.0) }
 
     it 'prints timeout warning' do
       timeouts = { connect_timeout: 5.0, read_timeout: 5.0, write_timeout: 5.0 }
@@ -63,10 +63,10 @@
   end
 
   context 'when Redis has high reconnect_attempts' do
-    let(:client) { Redis.new(timeout: 1, reconnect_attempts: 3) }
+    let(:client) { Redis.new(timeout: 1, reconnect_attempts: 2) }
 
     it 'prints reconnect_attempts warning' do
-      expect { storage }.to output(/Your setting is 3/).to_stderr
+      expect { storage }.to output(/Your setting is larger/).to_stderr
     end
   end
 
@@ -82,7 +82,7 @@
 
   context 'when ConnectionPool Redis client has high timeout' do
     let(:client) do
-      ConnectionPool.new(timeout: 1) { Redis.new(timeout: 7) }
+      ConnectionPool.new(timeout: 1) { Redis.new(timeout: 7.0) }
     end
 
     it 'prints Redis timeout warning' do