diff --git a/pyproject.toml b/pyproject.toml
index 9b00b703..db9d6b78 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ dev = [
     "pre-commit>=4.0",
     "ruff>=0.9",
     "click>=8.3",
-    "marimo>=0.23.6",
+    "marimo>=0.23.9",
 ]
 
 [tool.uv]
diff --git a/uv.lock b/uv.lock
index 6625d403..4e34a2b0 100644
--- a/uv.lock
+++ b/uv.lock
@@ -261,7 +261,7 @@ dev = [
 requires-dist = [
     { name = "click", marker = "extra == 'dev'", specifier = ">=8.3" },
     { name = "langchain", marker = "extra == 'dev'", specifier = ">=0.3.21" },
-    { name = "marimo", marker = "extra == 'dev'", specifier = ">=0.23.6" },
+    { name = "marimo", marker = "extra == 'dev'", specifier = ">=0.23.9" },
     { name = "nbformat", marker = "extra == 'dev'", specifier = ">=5.10.4" },
     { name = "openai", marker = "extra == 'dev'", specifier = ">=1.68.0" },
     { name = "pinecone", marker = "extra == 'dev'", specifier = ">=6.0.2" },
@@ -725,7 +725,7 @@ wheels = [
 
 [[package]]
 name = "marimo"
-version = "0.23.6"
+version = "0.23.9"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "click" },
@@ -740,6 +740,7 @@ dependencies = [
     { name = "psutil" },
     { name = "pygments" },
     { name = "pymdown-extensions" },
+    { name = "python-multipart" },
     { name = "pyyaml" },
     { name = "pyzmq" },
     { name = "starlette" },
@@ -748,9 +749,9 @@ dependencies = [
     { name = "uvicorn" },
     { name = "websockets" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/db/96/7f03859bfc88b9ee25f1562ad1e7e0284c442f2956eaf0f9c849836d378f/marimo-0.23.6.tar.gz", hash = "sha256:d63aeeee1e9ea7cac79bf2530daba915199153dce4d156fade7546474679d3ca", size = 38426356, upload-time = "2026-05-11T21:39:57.588Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/15/be/4a4c7bc1bc160d825c6ae1b4154add505a466532977a5516434ac57ce050/marimo-0.23.9.tar.gz", hash = "sha256:9fb7123aa0dacb202d53bc0989cecd1892435671efc4107b8d8491986b4a6bb9", size = 38538904, upload-time = "2026-06-04T23:06:06.505Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/44/a7/c19a6481dfe7762eb07a5bd0a7d7ae560a2ab5505a519bce159d0fd08beb/marimo-0.23.6-py3-none-any.whl", hash = "sha256:e8d19d875b0212600faa80eaaed0fd3f34dfb7b5241e630cf2b1cedd8dd14509", size = 38849553, upload-time = "2026-05-11T21:39:53.996Z" },
+    { url = "https://files.pythonhosted.org/packages/68/f4/ab8be4e65b37deb4d1d780df4a3555e983849ac280b0ec7967801fb438c8/marimo-0.23.9-py3-none-any.whl", hash = "sha256:2cbd50ce9a995c2a256b9a05cc1844f035060e070b8a85fdb32645719817dbdf", size = 38970788, upload-time = "2026-06-04T23:06:01.628Z" },
 ]
 
 [[package]]
@@ -1234,6 +1235,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/14/1b/a298b06749107c305e1fe0f814c6c74aea7b2f1e10989cb30f544a1b3253/python_dotenv-1.2.1-py3-none-any.whl", hash = "sha256:b81ee9561e9ca4004139c6cbba3a238c32b03e4894671e181b671e8cb8425d61", size = 21230, upload-time = "2025-10-26T15:12:09.109Z" },
 ]
 
+[[package]]
+name = "python-multipart"
+version = "0.0.32"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/5b/42/55c32bb9b12693c092ad250a0e82edb5b31ddeda6eb772de5f308b3804ad/python_multipart-0.0.32.tar.gz", hash = "sha256:be54b7f3fa167bb83e4fcd936b887b708f4e57fe75911c02aebf53efaf8d938e", size = 46881, upload-time = "2026-06-04T16:18:58.647Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/e1/04/e8135ebd1ad02c56ec633277529b2602ff99ff634be76cdba5744cf554fd/python_multipart-0.0.32-py3-none-any.whl", hash = "sha256:ff6d3f776f16878c894e52e107296ffc890e913c611b1a4ec6c44e2821fe2e23", size = 30042, upload-time = "2026-06-04T16:18:57.319Z" },
+]
+
 [[package]]
 name = "pyyaml"
 version = "6.0.3"