diff --git a/pyproject.toml b/pyproject.toml
index 35f8afc05..b8de65781 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,6 +24,7 @@ classifiers = [
     "Topic :: Scientific/Engineering :: Information Analysis",
 ]
 dependencies = [
+    "PyYAML>=6.0",
     "aiohttp",
     "fastapi>=0.115.0,<1.0",                          # server
     "fire",                                           # for MCP in LLS client
diff --git a/uv.lock b/uv.lock
index ef76142a6..db154122a 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1954,6 +1954,7 @@ dependencies = [
     { name = "pyjwt", extra = ["crypto"] },
     { name = "python-dotenv" },
     { name = "python-multipart" },
+    { name = "pyyaml" },
     { name = "rich" },
     { name = "sqlalchemy", extra = ["asyncio"] },
     { name = "starlette" },
@@ -2106,6 +2107,7 @@ requires-dist = [
     { name = "pyjwt", extras = ["crypto"], specifier = ">=2.10.0" },
     { name = "python-dotenv" },
     { name = "python-multipart", specifier = ">=0.0.20" },
+    { name = "pyyaml", specifier = ">=6.0" },
     { name = "rich" },
     { name = "sqlalchemy", extras = ["asyncio"], specifier = ">=2.0.41" },
     { name = "starlette" },