diff --git a/design_patterns/singleton_dp.ipynb b/design_patterns/singleton_dp.ipynb
index 172801b..24d56c9 100644
--- a/design_patterns/singleton_dp.ipynb
+++ b/design_patterns/singleton_dp.ipynb
@@ -10,7 +10,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 5,
    "metadata": {},
    "outputs": [
     {