diff --git a/requirements.txt b/requirements.txt
index 7e594f91..0da65c00 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ statsmodels==0.14.4
 pytest==8.3.4
 pytest-cov==6.0.0
 zarr==2.18.4
-ruff==0.8.6
+ruff==0.9.3
 netcdf4==1.7.2
 h5netcdf==1.5.0
 impactlab-tools==0.6.0