diff --git a/mcp-server/requirements.txt b/mcp-server/requirements.txt
index b3cf917..bd88056 100644
--- a/mcp-server/requirements.txt
+++ b/mcp-server/requirements.txt
@@ -1,3 +1,4 @@
 requests>=2.31.0
 python-dotenv>=1.0.0
 asyncio
+idna>=3.15 # not directly required, pinned by Snyk to avoid a vulnerability