diff --git a/requirements-optional.txt b/requirements-optional.txt
index 272984e952..370606f1b9 100644
--- a/requirements-optional.txt
+++ b/requirements-optional.txt
@@ -1,7 +1,7 @@
 matplotlib<3.10.10
 pillow>11,<12.2.1
 pyrevolve==2.2.8
-scipy>=1.8.0,<1.18.1
+scipy>=1.15.3,<1.18.1
 distributed<2026.7.2
 click<9.0
 cloudpickle<3.1.3
diff --git a/requirements-testing.txt b/requirements-testing.txt
index f2615758e3..382f373f7f 100644
--- a/requirements-testing.txt
+++ b/requirements-testing.txt
@@ -3,7 +3,7 @@ pytest-runner<6.0.2
 pytest-cov<7.1.1
 flake8-pyproject>=1.2.3,<1.2.5
 nbval<0.11.1
-scipy>=1.8.0,<1.18.1
+scipy>=1.15.3,<1.18.1
 pooch<1.9.1
 click<9.0
 cloudpickle<3.1.3