diff --git a/ruby/neo4j/driver/internal/cluster/routing_table_handler_impl.rb b/ruby/neo4j/driver/internal/cluster/routing_table_handler_impl.rb
index 42ed2437..f6968e08 100644
--- a/ruby/neo4j/driver/internal/cluster/routing_table_handler_impl.rb
+++ b/ruby/neo4j/driver/internal/cluster/routing_table_handler_impl.rb
@@ -60,7 +60,7 @@ def fresh_cluster_composition_fetched(composition_lookup_result)
           @log.debug("Fetched cluster composition for database '#{@database_name.description}'. #{composition_lookup_result.cluster_composition}")
           @routing_table.update(composition_lookup_result.cluster_composition)
           @routing_table_registry.remove_aged
-          addresses_to_retain = @routing_table_registry.all_servers.map(&:unicast_stream).reduce(&:+)
+          addresses_to_retain = @routing_table_registry.all_servers.map(&:unicast_stream).reduce(Set.new, :+)
 
           composition_lookup_result.resolved_initial_routers&.then do |addresses|
             addresses_to_retain << addresses
diff --git a/ruby/neo4j/driver/internal/cluster/routing_table_registry_impl.rb b/ruby/neo4j/driver/internal/cluster/routing_table_registry_impl.rb
index d7c63828..288c9b09 100644
--- a/ruby/neo4j/driver/internal/cluster/routing_table_registry_impl.rb
+++ b/ruby/neo4j/driver/internal/cluster/routing_table_registry_impl.rb
@@ -52,7 +52,7 @@ def ensure_routing_table(context)
         def all_servers
           # obviously we just had a snapshot of all servers in all routing tables
           # after we read it, the set could already be changed.
-          @routing_table_handlers.values.map(&:servers).reduce(&:+)
+          @routing_table_handlers.values.map(&:servers).reduce(Set.new, :+)
         end
 
         def remove(database_name)
diff --git a/ruby/neo4j/driver/version.rb b/ruby/neo4j/driver/version.rb
index 68ce1f83..7e7848e8 100644
--- a/ruby/neo4j/driver/version.rb
+++ b/ruby/neo4j/driver/version.rb
@@ -2,6 +2,6 @@
 
 module Neo4j
   module Driver
-    VERSION = '4.4.5'
+    VERSION = '4.4.6'
   end
 end