diff --git a/requirements.txt b/requirements.txt
index 1999a986..f72ec397 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ statsmodels==0.14.0
 pytest==7.4.3
 pytest-cov==4.1.0
 zarr==2.16.1
-black==23.11.0
+black==23.12.1
 ruff==0.1.9
 netcdf4==1.6.5
 h5netcdf==1.3.0