diff --git a/Section 1 - Differential Privacy.ipynb b/Section 1 - Differential Privacy.ipynb
index 7b7bece..17acd71 100644
--- a/Section 1 - Differential Privacy.ipynb	
+++ b/Section 1 - Differential Privacy.ipynb	
@@ -88,7 +88,7 @@
    "source": [
     "def get_parallel_db(db, remove_index):\n",
     "\n",
-    "    return torch.cat((db[0:remove_index], \n",
+    "    return torch.cat((db[:remove_index], \n",
     "                      db[remove_index+1:]))"
    ]
   },