diff --git a/pyproject.toml b/pyproject.toml
index c00118e..6b871e0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,9 +11,14 @@ requires-python = ">=3.11"
 license = {text = "MIT"}
 dependencies = [
     "httpx>=0.27",
+    "pydantic>=2.0",
     "pyyaml>=6.0",
 ]
 
+[project.optional-dependencies]
+dev = ["pytest>=7.0", "pytest-mock>=3.0"]
+web = ["fastapi>=0.100", "uvicorn>=0.20", "websockets>=11.0"]
+
 
 [project.scripts]
 meeting-room = "meeting_room.cli:main"
diff --git a/requirements.txt b/requirements.txt
index 21b8f47..b5bf415 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 httpx>=0.27
-pyyaml>=6.0
+pydantic>=2.0
+pyyaml>=6.0
\ No newline at end of file