diff --git a/lec4.ipynb b/lec4.ipynb
index cd1c4bd..487cf03 100644
--- a/lec4.ipynb
+++ b/lec4.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Начало лабораторной работы"
+    "##Лабораторная 4"
    ]
   },
   {