diff --git a/requirements-dev.txt b/requirements-dev.txt
index a889cba..114c49d 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,4 +1,4 @@
-black==22.3.0
+black==25.1.0
 click==8.0.4
 pytest-cov>=2.6.1
 pytest>=4.4.0
diff --git a/simuk/tests/test_sbc.py b/simuk/tests/test_sbc.py
index 17e0e1a..1a53b0d 100644
--- a/simuk/tests/test_sbc.py
+++ b/simuk/tests/test_sbc.py
@@ -40,6 +40,7 @@ def log_likelihood(theta, observed):
 df = pd.DataFrame({"x": x, "y": y})
 bmb_model = bmb.Model("y ~ x", df)
 
+
 # NumPyro models
 def eight_schools_cauchy_prior(J, sigma, y=None):
     mu = numpyro.sample("mu", dist.Normal(0, 5))