diff --git a/cllm/main.py b/cllm/main.py
index f896750..0b92f1e 100644
--- a/cllm/main.py
+++ b/cllm/main.py
@@ -3,14 +3,27 @@
 import os
 import json
 import platform
-from langchain.chains import LLMChain
+import tomllib
 from langchain_openai import ChatOpenAI
 from langchain_core.prompts import (ChatPromptTemplate, FewShotChatMessagePromptTemplate)
 
-app = typer.Typer(help="Empower your CLI experience with a command search tool driven by LLM magic!")
+from typing import Optional
+from typing_extensions import Annotated
+
+# version of the CLI
+app = typer.Typer(help="Empower your CLI experience with a command search tool driven by LLM magic!",
+                  context_settings={"help_option_names": ["-h", "--help"]}
+                  )
 
 app.add_typer(set_index.set_app, name="set", help="Set up configurations used in cllm")
 
+def version_callback(value: bool):
+    if value:
+        with open("./pyproject.toml", "rb") as f:
+            data = tomllib.load(f)
+            typer.echo(f"cllm version: {data['tool']['poetry']['version']}")
+        raise typer.Exit()
+
 @app.command()
 def search(query : str):
     """Search a command from the LLM model"""
@@ -66,5 +79,11 @@ def search(query : str):
     
     typer.echo(output.content)
 
+@app.callback()
+def main(
+        version: Optional[bool] = typer.Option(None, "--version", "-v", callback=version_callback, help="Print cllm version")
+):
+    pass
+
 if __name__ == "__main__":
     app()