diff --git a/ch15/requirements/requirements.txt b/ch15/requirements/requirements.txt
index 571a994..a67d7a0 100644
--- a/ch15/requirements/requirements.txt
+++ b/ch15/requirements/requirements.txt
@@ -14,7 +14,7 @@ dnspython==2.7.0
     # via email-validator
 email-validator==2.2.0
     # via pydantic
-idna==3.10
+idna==3.15
     # via
     #   email-validator
     #   requests