diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index ae714a1..afbc722 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,5 +1,5 @@
 repos:
   - repo: https://github.com/psf/black-pre-commit-mirror
-    rev: "23.12.1"
+    rev: "24.1.1"
     hooks:
       - id: black-jupyter
diff --git a/machine-learning-das/notebooks/6-vae-mnist.ipynb b/machine-learning-das/notebooks/6-vae-mnist.ipynb
index 9f5d18e..6f6f57d 100644
--- a/machine-learning-das/notebooks/6-vae-mnist.ipynb
+++ b/machine-learning-das/notebooks/6-vae-mnist.ipynb
@@ -165,7 +165,6 @@
     "\n",
     "\n",
     "class KLDivergenceLayer(Layer):\n",
-    "\n",
     "    \"\"\"Identity transform layer that adds KL divergence\n",
     "    to the final model loss.\n",
     "    \"\"\"\n",