diff --git a/requirements/preparation.in b/requirements/preparation.in
index e8301838..f44758d9 100644
--- a/requirements/preparation.in
+++ b/requirements/preparation.in
@@ -1,7 +1,7 @@
 # Exact local CPU preparation environment; GPU training gets a separate lock.
 --index-url https://pypi.org/simple
 --extra-index-url https://download.pytorch.org/whl/cpu
-numpy==2.5.3
+numpy==2.5.4
 tokenizers==0.23.2
 mwparserfromhell==0.7.2
 defusedxml==0.7.1