diff --git a/rhodecode/lib/markup_renderer.py b/rhodecode/lib/markup_renderer.py
--- a/rhodecode/lib/markup_renderer.py
+++ b/rhodecode/lib/markup_renderer.py
@@ -475,7 +475,8 @@ class MarkupRenderer(object):
 
         def as_html(notebook):
             conf = config.Config()
-            conf.CustomHTMLExporter.preprocessors = [Sandbox]
+            conf.CustomHTMLExporter.default_preprocessors = [Sandbox]
+            conf.Sandbox.enabled = True
             html_exporter = CustomHTMLExporter(config=conf)
 
             (body, resources) = html_exporter.from_notebook_node(notebook)
@@ -518,7 +519,8 @@ class MarkupRenderer(object):
             body = '\n'.join([header, css, js, body])
             return body, resources
 
-        notebook = nbformat.reads(source, as_version=nbformat.NO_CONVERT)
+        # TODO: In the event of a newer jupyter notebook version, consider increasing the as_version parameter
+        notebook = nbformat.reads(source, as_version=4)
         (body, resources) = as_html(notebook)
         return body
 
diff --git a/rhodecode/tests/lib/test_markup_renderer.py b/rhodecode/tests/lib/test_markup_renderer.py
--- a/rhodecode/tests/lib/test_markup_renderer.py
+++ b/rhodecode/tests/lib/test_markup_renderer.py
@@ -683,3 +683,103 @@ def test_relative_path(src_path, server_
 def test_relative_links(src_html, expected_html):
     server_paths = {'raw': '/path/raw/file.md', 'standard': '/path/file.md'}
     assert relative_links(src_html, server_paths=server_paths) == expected_html
+
+
+@pytest.mark.parametrize("notebook_source, expected_output", [
+    ("""
+        {
+          "nbformat": 3,
+          "nbformat_minor": 0,
+          "worksheets": [
+            {
+              "cells": [
+                {
+                  "cell_type": "code",
+                  "execution_count": 1,
+                  "metadata": {},
+                  "outputs": [
+                    {
+                      "name": "stdout",
+                      "output_type": "stream",
+                      "text": [
+                        "Hello, World!\\n"
+                      ]
+                    }
+                  ],
+                  "input": "print('Hello, World!')"
+                }
+              ]
+            }
+          ],
+          "metadata": {
+            "kernelspec": {
+              "display_name": "Python 3",
+              "language": "python",
+              "name": "python3"
+            },
+            "language_info": {
+              "codemirror_mode": {
+                "name": "ipython",
+                "version": 3
+              },
+              "file_extension": ".py",
+              "mimetype": "text/x-python",
+              "name": "python",
+              "nbconvert_exporter": "python",
+              "pygments_lexer": "ipython3",
+              "version": "3.8.5"
+            }
+          }
+        }
+    """, "Hello, World!"),
+    ("""
+        {
+          "nbformat": 4,
+          "nbformat_minor": 1,
+          "cells": [
+            {
+              "cell_type": "code",
+              "execution_count": 1,
+              "metadata": {},
+              "outputs": [
+                {
+                  "name": "stdout",
+                  "output_type": "stream",
+                  "text": [
+                    "Hello, World!\\n"
+                  ]
+                }
+              ],
+              "source": [
+                "print('Hello, World!')"
+              ]
+            }
+          ],
+          "metadata": {
+            "kernelspec": {
+              "display_name": "Python 3",
+              "language": "python",
+              "name": "python3"
+            },
+            "language_info": {
+              "codemirror_mode": {
+                "name": "ipython",
+                "version": 4
+              },
+              "file_extension": ".py",
+              "mimetype": "text/x-python",
+              "name": "python",
+              "nbconvert_exporter": "python",
+              "pygments_lexer": "ipython3",
+              "version": "3.9.1"
+            }
+          }
+        }
+    """, "Hello, World!")
+])
+def test_jp_notebook_html_generation(notebook_source, expected_output):
+    import mock
+    with mock.patch('rhodecode.lib.helpers.asset'):
+        body = MarkupRenderer.jupyter(notebook_source)
+        assert "<!-- ## IPYTHON NOTEBOOK RENDERING ## -->" in body
+        assert expected_output in body