diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 9cbeead0..65c4a71e 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -2,7 +2,7 @@ exclude: .*\.rpt$
 
 repos:
 - repo: https://github.com/psf/black-pre-commit-mirror
-  rev: 25.12.0
+  rev: 26.1.0
   hooks:
   - id: black-jupyter
     language_version: python3
diff --git a/part6_cnns.ipynb b/part6_cnns.ipynb
index 94921ca3..dd940a1a 100644
--- a/part6_cnns.ipynb
+++ b/part6_cnns.ipynb
@@ -490,7 +490,6 @@
     "import pandas as pd\n",
     "from sklearn import metrics\n",
     "\n",
-    "\n",
     "labels = ['%i' % nr for nr in range(0, n_classes)]  # If you want to look at all the labels\n",
     "# labels = ['0','1','9'] # Look at only a few labels, here for digits 0, 1 and 9\n",
     "print('Plotting ROC for labels {}'.format(labels))\n",