diff --git a/assignment4/Assignment4.ipynb b/assignment4/Assignment4.ipynb
index 5829646..b25b495 100644
--- a/assignment4/Assignment4.ipynb
+++ b/assignment4/Assignment4.ipynb
@@ -33,7 +33,7 @@
       },
       "source": [
         "**Submission deadline:**\n",
-        "* **Regular problems: last lab session before or on Monday, 9.01.2020**\n",
+        "* **Regular problems: last lab session before or on Monday, 13.01.2020**\n",
         "* **Bonus problems: Last lab during semester**\n",
         "\n",
         "**Points: 5 + 9 bonus points**\n",