diff --git a/04_DenoiSplit/exercise.ipynb b/04_DenoiSplit/exercise.ipynb
index e78b1c0..a62de5a 100644
--- a/04_DenoiSplit/exercise.ipynb
+++ b/04_DenoiSplit/exercise.ipynb
@@ -796,7 +796,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "337b207c",
+   "id": "dbecd052",
    "metadata": {},
    "source": [
     "<hr style=\"height:2px;\"><div class=\"alert alert-block alert-success\"><h1>End of the exercise</h1>\n",