diff --git a/backend/requirements-pinned.txt b/backend/requirements-pinned.txt
index e1a87980..97a51227 100644
--- a/backend/requirements-pinned.txt
+++ b/backend/requirements-pinned.txt
@@ -110,7 +110,7 @@ httptools==0.7.1
     # via uvicorn
 httpx==0.28.1
     # via connexion
-idna==3.11
+idna==3.15
     # via
     #   anyio
     #   httpx