From 100146d9e61be107f44e9d5046aa79be85aa989b Mon Sep 17 00:00:00 2001
From: Aidan Feldman <alf2215@columbia.edu>
Date: Thu, 16 Oct 2025 17:11:35 -0400
Subject: [PATCH] include nbformat as a plotly[express] dependency

Required for MimeType rendering.
---
 CHANGELOG.md   | 4 ++++
 pyproject.toml | 5 ++++-
 uv.lock        | 4 +++-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5a91d7051e..2e5e5f4e3d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
+### Updated
+
+- Include `nbformat` as a dependency for `plotly[express]`. [[#5380](https://github.com/plotly/plotly.py/pull/5380)]
+
 ## [6.3.1] - 2025-10-02
 
 ### Updated
diff --git a/pyproject.toml b/pyproject.toml
index 24a2bbade8..ce2786dfb4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,10 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-express = ["numpy"]
+express = [
+    "numpy",
+    "nbformat>=4.2.0"
+]
 kaleido = ["kaleido>=1.0.0"]
 dev_core = [
     "pytest",
diff --git a/uv.lock b/uv.lock
index f60357c3ff..c823e60b45 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1,5 +1,5 @@
 version = 1
-revision = 2
+revision = 3
 requires-python = ">=3.8"
 resolution-markers = [
     "python_full_version >= '3.12'",
@@ -4397,6 +4397,7 @@ dev-optional = [
     { name = "xarray", version = "2025.6.0", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.10'" },
 ]
 express = [
+    { name = "nbformat" },
     { name = "numpy", version = "1.24.4", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.9'" },
     { name = "numpy", version = "2.0.2", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version == '3.9.*'" },
     { name = "numpy", version = "2.2.6", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version == '3.10.*'" },
@@ -4417,6 +4418,7 @@ requires-dist = [
     { name = "jupyter", marker = "extra == 'dev-build'" },
     { name = "kaleido", marker = "extra == 'kaleido'", specifier = ">=1.0.0" },
     { name = "narwhals", specifier = ">=1.15.1" },
+    { name = "nbformat", marker = "extra == 'express'", specifier = ">=4.2.0" },
     { name = "numpy", marker = "extra == 'dev-optional'" },
     { name = "numpy", marker = "extra == 'express'" },
     { name = "orjson", marker = "extra == 'dev-optional'" },