diff --git a/random.ipynb b/random.ipynb
index f089f15..171c6ab 100644
--- a/random.ipynb
+++ b/random.ipynb
@@ -110,7 +110,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## numpy里random总结：\n",
+    "# numpy里random总结：\n",
     "\n",
     "1. np.random.randn()\n",
     "语法： numpy.random.randn(d0,d1,…,dn)\n",