diff --git a/book/update.cgi b/book/update.cgi
index a6b078d4..baea8731 100755
--- a/book/update.cgi
+++ b/book/update.cgi
@@ -1,32 +1,57 @@
-#!/usr/bin/perl
-
-use strict;
-use warnings;
-
-use CGI;
-my $r = new CGI;
-
-print $r->header();
-print "pulling repo...
";
-system 'git fetch origin && git reset --hard origin/master';
-system 'git submodule update --init --recursive';
-print "
done.
";
-
-print "building documentation...
";
-chdir "..";
-
-my $status = system('/bin/bash', '-c', '
- source venv/bin/activate &&
- poetry install --only docs &&
- sphinx-build -M html underactuated /tmp/underactuated_doc &&
- rm -rf book/python &&
- cp -r /tmp/underactuated_doc/html book/python
-');
-
-if ($status == 0) {
- print "
done.
";
-} else {
- print "
Error occurred: $status";
-}
-
-print $r->end_html;
+#!/usr/bin/env python3
+
+import os
+import subprocess
+
+try:
+ git_output = subprocess.run(
+ ["git", "fetch", "origin"], capture_output=True, text=True, check=True
+ ).stdout
+
+ git_output += subprocess.run(
+ ["git", "reset", "--hard", "origin/master"],
+ capture_output=True,
+ text=True,
+ check=True,
+ ).stdout
+
+ git_output += subprocess.run(
+ ["git", "submodule", "update", "--init", "--recursive"],
+ capture_output=True,
+ text=True,
+ check=True,
+ ).stdout
+
+ os.chdir("..")
+
+ build_output = subprocess.run(
+ [
+ "/bin/bash",
+ "-c",
+ "source venv/bin/activate && "
+ "poetry install --only docs && "
+ "sphinx-build -M html underactuated /tmp/underactuated_doc && "
+ "rm -rf book/python && "
+ "cp -r /tmp/underactuated_doc/html book/python",
+ ],
+ capture_output=True,
+ text=True,
+ check=True,
+ ).stdout
+
+ # Now we can safely print headers and content
+ print("Content-Type: text/html\n")
+ print("")
+ print("pulling repo...
")
+ print(f"{git_output}")
+ print("done.
")
+ print("building documentation...
")
+ print(f"{build_output}")
+ print("done.
")
+ print("")
+
+except Exception as e:
+ print("Content-Type: text/html\n")
+ print("")
+ print(f"Error: {str(e)}
")
+ print("")