diff --git a/examples/complex_llm_workflow/diagram.md b/examples/complex_llm_workflow/diagram.md
new file mode 100644
index 0000000..3e86da4
--- /dev/null
+++ b/examples/complex_llm_workflow/diagram.md
@@ -0,0 +1,21 @@
+```mermaid
+flowchart LR
+in((In))
+out((Out))
+llm_1[LLM 1]
+gate{Gate}
+parallel_workflow_aggregator[Parallel workflow Aggregator]
+llm_2[LLM 2]
+llm_3[LLM 3]
+llm_4[LLM 4]
+in --> llm_1
+llm_1 --> gate
+gate -->|success| llm_2
+gate -->|success| llm_3
+gate -->|success| llm_4
+gate -->|default| out
+llm_2 --> parallel_workflow_aggregator
+parallel_workflow_aggregator --> out
+llm_3 --> parallel_workflow_aggregator
+llm_4 --> parallel_workflow_aggregator
+```
diff --git a/examples/complex_llm_workflow/generator.rb b/examples/complex_llm_workflow/generator.rb
index d96acd4..ce1b5e6 100755
--- a/examples/complex_llm_workflow/generator.rb
+++ b/examples/complex_llm_workflow/generator.rb
@@ -7,23 +7,62 @@
   config.openai_api_key = ENV.fetch("OPENAI_API_KEY", nil)
 end
 
+# Define schema for sports
+class SportsSchema < RubyLLM::Schema
+  array :sports do
+    object do
+      string :name
+      array :top_3_players do
+        string :name
+      end
+    end
+  end
+end
+
+sports_schema = SportsSchema.new
+
+# Define weather tool
+class Weather < RubyLLM::Tool
+  description "Gets current weather for a location"
+
+  params do
+    string :latitude, description: "Latitude (e.g., 52.5200)"
+    string :longitude, description: "Longitude (e.g., 13.4050)"
+  end
+
+  def execute(latitude:, longitude:)
+    url = "https://api.open-meteo.com/v1/forecast?latitude=#{latitude}&longitude=#{longitude}&current=temperature_2m,wind_speed_10m"
+    response = Net::HTTP.get_response(URI(url))
+    JSON.parse(response.body)
+  rescue StandardError => e
+    { error: e.message }
+  end
+end
+
+weather_tool = Weather.new
+
 # Create the LLMs
 llm1 = Mars::Agent.new(
   name: "LLM 1", options: { model: "gpt-4o" },
-  instructions: "You are a helpful assistant that can answer questions and help with tasks. Only answer with the result"
+  instructions: "You are a helpful assistant that can answer questions.
+                 When asked about a country, only answer with its name."
 )
 
 llm2 = Mars::Agent.new(name: "LLM 2", options: { model: "gpt-4o" },
                        instructions: "You are a helpful assistant that can answer questions and help with tasks.
                        Return information about the typical food of the country.")
 
-llm3 = Mars::Agent.new(name: "LLM 3", options: { model: "gpt-4o" },
+llm3 = Mars::Agent.new(name: "LLM 3", options: { model: "gpt-4o" }, schema: sports_schema,
                        instructions: "You are a helpful assistant that can answer questions and help with tasks.
                        Return information about the popular sports of the country.")
 
+llm4 = Mars::Agent.new(name: "LLM 4", options: { model: "gpt-4o" }, tools: [weather_tool],
+                       instructions: "You are a helpful assistant that can answer questions and help with tasks.
+                       Return the current weather of the country's capital.")
+
 parallel_workflow = Mars::Workflows::Parallel.new(
   "Parallel workflow",
-  steps: [llm2, llm3]
+  steps: [llm2, llm3, llm4]
 )
 
 gate = Mars::Gate.new(
@@ -39,4 +78,10 @@
   steps: [llm1, gate]
 )
 
-puts sequential_workflow.run("Which is the last country to declare independence?")
+# Generate and save the diagram
+diagram = Mars::Rendering::Mermaid.new(sequential_workflow).render
+File.write("examples/complex_llm_workflow/diagram.md", diagram)
+puts "Complex workflow diagram saved to: examples/complex_llm_workflow/diagram.md"
+
+# Run the workflow
+puts sequential_workflow.run("Which is the largest country in South America?")
diff --git a/lib/mars.rb b/lib/mars.rb
index 68e23d7..6e04847 100644
--- a/lib/mars.rb
+++ b/lib/mars.rb
@@ -3,6 +3,7 @@
 require "zeitwerk"
 require "async"
 require "ruby_llm"
+require "ruby_llm/schema"
 
 loader = Zeitwerk::Loader.for_gem
 loader.setup
diff --git a/mars.gemspec b/mars.gemspec
index 3d4bd97..00ac76e 100644
--- a/mars.gemspec
+++ b/mars.gemspec
@@ -36,7 +36,7 @@ Gem::Specification.new do |spec|
 
   # Uncomment to register a new dependency of your gem
   spec.add_dependency "async", "~> 2.34"
-  spec.add_dependency "ruby_llm", "~> 1.0"
+  spec.add_dependency "ruby_llm", "~> 1.9"
   spec.add_dependency "zeitwerk", "~> 2.7"
 
   # For more information and examples about making a new gem, check out our