diff --git a/f23/Gurmail_Lecture_Notes/31_Web-3/lec_31_web3.ipynb b/f23/Gurmail_Lecture_Notes/31_Web-3/lec_31_web3.ipynb
index db8a78c08e1e52fbd27584ac96b52e1108516438..070e6b1d350b0689ead4388ec58d633ac238f56e 100644
--- a/f23/Gurmail_Lecture_Notes/31_Web-3/lec_31_web3.ipynb
+++ b/f23/Gurmail_Lecture_Notes/31_Web-3/lec_31_web3.ipynb
@@ -71,7 +71,7 @@
    "outputs": [],
    "source": [
     "# Get this page using requests.  \n",
-    "url = \"https://cs220.cs.wisc.edu/s23/syllabus.html\"\n",
+    "url = \"https://cs220.cs.wisc.edu/f23/syllabus.html\"\n",
     "r = requests.get(url)\n",
     "\n",
     "# make sure there is no error\n",
diff --git a/f23/Gurmail_Lecture_Notes/31_Web-3/lec_31_web3_template_Gurmail_lec1.ipynb b/f23/Gurmail_Lecture_Notes/31_Web-3/lec_31_web3_template_Gurmail_lec1.ipynb
index fc5ed5afc1b4586a941f10ea589d3d4a4fc0e768..09a61d301abe29b0540d092d167f54b0af5c6f86 100644
--- a/f23/Gurmail_Lecture_Notes/31_Web-3/lec_31_web3_template_Gurmail_lec1.ipynb
+++ b/f23/Gurmail_Lecture_Notes/31_Web-3/lec_31_web3_template_Gurmail_lec1.ipynb
@@ -71,7 +71,7 @@
    "outputs": [],
    "source": [
     "# Get this page using requests.  \n",
-    "url = \"https://cs220.cs.wisc.edu/s23/syllabus.html\"\n",
+    "url = \"https://cs220.cs.wisc.edu/f23/syllabus.html\"\n",
     "\n",
     "# make sure there is no error\n",
     "\n",
diff --git a/f23/Gurmail_Lecture_Notes/31_Web-3/lec_31_web3_template_Gurmail_lec2.ipynb b/f23/Gurmail_Lecture_Notes/31_Web-3/lec_31_web3_template_Gurmail_lec2.ipynb
index fc5ed5afc1b4586a941f10ea589d3d4a4fc0e768..09a61d301abe29b0540d092d167f54b0af5c6f86 100644
--- a/f23/Gurmail_Lecture_Notes/31_Web-3/lec_31_web3_template_Gurmail_lec2.ipynb
+++ b/f23/Gurmail_Lecture_Notes/31_Web-3/lec_31_web3_template_Gurmail_lec2.ipynb
@@ -71,7 +71,7 @@
    "outputs": [],
    "source": [
     "# Get this page using requests.  \n",
-    "url = \"https://cs220.cs.wisc.edu/s23/syllabus.html\"\n",
+    "url = \"https://cs220.cs.wisc.edu/f23/syllabus.html\"\n",
     "\n",
     "# make sure there is no error\n",
     "\n",