diff --git a/README.md b/README.md
index c850ea0..63c58c0 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ Interactive demo for [ignfab/geocontext](https://github.com/ignfab/geocontext#re
 | MODEL_NAME           | The name of the model (see [LangGraph - create_react_agent](https://langchain-ai.github.io/langgraph/agents/models/#use-in-an-agent) / [init_chat_model](https://python.langchain.com/api_reference/langchain/chat_models/langchain.chat_models.base.init_chat_model.html)) | "anthropic:claude-sonnet-4-6" |
 | ANTHROPIC_API_KEY    | Required from `anthropic:*` models (https://console.anthropic.com/settings/keys)                                                                                                                                                                                            |                                      |
 | GOOGLE_API_KEY       | Required from `google_genai:*` models (https://aistudio.google.com/api-keys)                                                                                                                                                                                                |                                      |
-| TEMPERATURE          | Model temperature                                                                                                                                                                                                                                                           | 0                                    |
+| TEMPERATURE          | Model temperature                                                                                                                                                                                                                                                           | 0.0                                    |
 | DB_URI               | URL of the PostgreSQL (`postgresql://postgres:ChangeIt@localhost:5432/geocontext`) or Redis (ex : `redis://default:ChangeIt@localhost:6379/0`) database.                                                                                                                    | None (use InMemorySaver)             |
 | CONTACT_EMAIL        | Email for the contact button.                                                                                                                                                                                                                                               | "dev@localhost"                      |
 | GEOCONTEXT_LOG_LEVEL | Log level for Geocontext MCP.                                                                                                                                                                                                                                               | error                                |                  
diff --git a/agent.py b/agent.py
index 0058e68..becee9a 100644
--- a/agent.py
+++ b/agent.py
@@ -11,17 +11,19 @@
 
 from tools import create_map
 
-# retreive model name from environment variable or use default
+# retrieve model name from environment variable or use default
 MODEL_NAME = os.getenv("MODEL_NAME", "anthropic:claude-sonnet-4-6")
 # retrieve temperature from environment variable or use default
-TEMPERATURE = int(os.getenv("TEMPERATURE",0))
+TEMPERATURE = float(os.getenv("TEMPERATURE", 0.0))
 # ensure that the required environment variable is set for anthropic models
 if MODEL_NAME.startswith("anthropic:"):
     if os.getenv("ANTHROPIC_API_KEY", None) is None:
         raise ValueError("ANTHROPIC_API_KEY environment variable is required for anthropic models")
+    if TEMPERATURE < 0 or TEMPERATURE > 1:
+        raise ValueError("TEMPERATURE must be between 0 and 1")
 
 
-logger.info(f"Create graph using model: {MODEL_NAME}")
+logger.info(f"Create graph using model: {MODEL_NAME} with temperature: {TEMPERATURE}")
 model = init_chat_model(MODEL_NAME, temperature=TEMPERATURE)
 
 
diff --git a/docker-compose.yaml b/docker-compose.yaml
index fc8c5d5..d7e57ab 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -7,7 +7,7 @@ services:
         - https_proxy
     environment:
       - MODEL_NAME=${MODEL_NAME:-anthropic:claude-sonnet-4-6}
-      - TEMPERATURE=${TEMPERATURE:-0}
+      - TEMPERATURE=${TEMPERATURE:-0.0}
       - ANTHROPIC_API_KEY
       - GOOGLE_API_KEY
       - HTTP_PROXY