diff --git a/requirements-optional.txt b/requirements-optional.txt
index ca8cfa681a..b3d90369c8 100644
--- a/requirements-optional.txt
+++ b/requirements-optional.txt
@@ -2,6 +2,6 @@ matplotlib<3.10.9
 pillow>11,<12.0.1
 pyrevolve==2.2.7
 scipy<1.15.4
-distributed<2025.11.1
+distributed<2025.12.1
 click<9.0
 cloudpickle<3.1.3