diff --git a/requirements.txt b/requirements.txt
index 9397500..ef220e9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ fastmcp==2.4.0
 python-dotenv
 pydantic>=2.0.0,<2.12.0
 pydantic-settings>=2.0.0,<2.11.0
-PyYAML>=6.0.0
+PyYAML>=6.0.3
 
 # HTTP client (version managed by fastmcp dependencies)
 httpx