diff --git a/tools/requirements.txt b/tools/requirements.txt
index 93cf8f74..747d3648 100644
--- a/tools/requirements.txt
+++ b/tools/requirements.txt
@@ -1,6 +1,6 @@
 aiohttp==3.13.3
 amsterdam-schema-tools==7.6.3
-attrs==21.4.0
+attrs==25.4.0
 certifi==2024.7.4
 charset-normalizer==2.0.12
 click==8.1.3