diff --git a/Development.md b/Development.md
index c67b569014..c3e08c3321 100644
--- a/Development.md
+++ b/Development.md
@@ -94,3 +94,8 @@ poetry run pytest ./tests/unit/test_sandbox.py
 #### Integration tests
 
 Please refer to [this README](./tests/integration/README.md) for details.
+
+### 9. Add or update dependency
+
+1. Add your dependency in `pyproject.toml` or use `peotry add xxx`
+2. Update the poetry.lock file via `poetry lock --no-update`
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