diff --git a/requirements.txt b/requirements.txt
index e81641d..9a28050 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ certifi==2025.6.15
 click==8.1.8
 frozenlist==1.7.0
 hiredis==3.2.1
-idna==3.10
+idna==3.15
 multidict==6.5.0
 openttd-helpers==1.4.0
 openttd-protocol==1.7.1