diff --git a/config/application.yml.default b/config/application.yml.default
index 5ea870d40fc..d37b63909ea 100644
--- a/config/application.yml.default
+++ b/config/application.yml.default
@@ -234,6 +234,7 @@ redis_irs_attempt_api_url: redis://localhost:6379/2
 redis_throttle_url: redis://localhost:6379/1
 redis_url: redis://localhost:6379/0
 redis_pool_size: 10
+redis_session_pool_size: 10
 redis_throttle_pool_size: 5
 reg_confirmed_email_max_attempts: 20
 reg_confirmed_email_window_in_minutes: 60
diff --git a/config/initializers/redis.rb b/config/initializers/redis.rb
index 4edf5057a37..f7b166a38a7 100644
--- a/config/initializers/redis.rb
+++ b/config/initializers/redis.rb
@@ -11,3 +11,10 @@
     redis: Redis.new(url: IdentityConfig.store.redis_throttle_url),
   )
 end
+
+REDIS_SESSION_POOL_WRAPPER = ConnectionPool::Wrapper.new(
+  size: IdentityConfig.store.redis_session_pool_size,
+) do
+  # redis-session-store does its own namespacing in session_store.rb
+  Redis.new(url: IdentityConfig.store.redis_url)
+end
diff --git a/config/initializers/session_store.rb b/config/initializers/session_store.rb
index ac1b4f63e7f..a1c3ab5bbca 100644
--- a/config/initializers/session_store.rb
+++ b/config/initializers/session_store.rb
@@ -13,7 +13,7 @@
     ttl: IdentityConfig.store.session_timeout_in_minutes.minutes,
 
     key_prefix: "#{IdentityConfig.store.domain_name}:session:",
-    url: IdentityConfig.store.redis_url,
+    client: REDIS_SESSION_POOL_WRAPPER,
   },
   on_session_load_error: SessionEncryptorErrorHandler,
   serializer: SessionEncryptor.new,
diff --git a/lib/identity_config.rb b/lib/identity_config.rb
index 191d47d0001..eff7656fb00 100644
--- a/lib/identity_config.rb
+++ b/lib/identity_config.rb
@@ -322,6 +322,7 @@ def self.build_store(config_map)
     config.add(:redis_throttle_url)
     config.add(:redis_url)
     config.add(:redis_pool_size, type: :integer)
+    config.add(:redis_session_pool_size, type: :integer)
     config.add(:redis_throttle_pool_size, type: :integer)
     config.add(:reg_confirmed_email_max_attempts, type: :integer)
     config.add(:reg_confirmed_email_window_in_minutes, type: :integer)