diff --git a/pyproject.toml b/pyproject.toml
index 38b1098..cf64b66 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,6 +9,7 @@ description = "Teleo Pipeline v2 — async daemon for claim extraction, validati
 requires-python = ">=3.11"
 dependencies = [
     "aiohttp>=3.9,<4",
+    "PyYAML>=6,<7",
 ]
 
 [project.optional-dependencies]