Release notes

This page lists highlights, bug fixes, and known issues for the latest release of Streamlit. If you're looking for information about nightly releases or experimental features, see Pre-release features.

Upgrade Streamlit

pip install --upgrade streamlit

Version 1.64.0 (latest)

Release date: September 15, 2026

Highlights

• ✨ Introducing st.echarts_chart, a new command that renders Apache ECharts options with Streamlit theming, and accepts dicts, JSON strings, or pyecharts charts (#16785).
• 🔀 Streamlit now supports async/await in app code, so you can use async libraries like httpx, aiohttp, and asyncpg directly (#16167, #744).
  • st.cache_data and st.cache_resource work with async def functions and cache the awaited result (#16168).
• 🆕 Announcing live updates for st.text_input: set live=True and the widget commits while the user types, after a short pause (#16662, #4553).

Notable Changes

• 🎛 The on_change="ignore" mode reaches three more widgets, so a new value updates the widget and any bound query parameter without a rerun:
  • st.number_input (#16649).
  • st.select_slider (#16776).
  • st.selectbox (#16862).
• 👻 The mapbox.token config option is removed. Set the MAPBOX_API_KEY environment variable, or pass PyDeck api_keys instead (#16774, #16676, #16678).

Other Changes

• 🐛 Bug fix: st.dialog hides a leftover dialog as soon as the next full-app run starts, so st.rerun() closes the modal before later blocking work (#16901, #9405).
• 🦋 Bug fix: st.dataframe and st.data_editor convert list columns that PyArrow cannot serialize to strings, instead of raising when the nesting levels differ (#16838, #9380).
• 🪲 Bug fix: Widgets after st.rerun keep the values the user selected, instead of resetting to their defaults (#16762, #3533).
• 🐜 Bug fix: Altair mark_geoshape charts render on first view, instead of showing an empty plot (#16886, #2910).
• 🐝 Bug fix: st.pydeck_chart honors pydeck views, so OrbitView, GlobeView, and map_provider=None render as specified (#16819, #2590, #2302, #9933).
• 🐞 Bug fix: st.pydeck_chart renders layers that declare deck.gl extensions, instead of showing an error box (#16823).
• 🕷️ Bug fix: Altair binding_radio and binding_select stay a single widget when on_select is enabled (#16809, #8765).
• 🪳 Bug fix: Vega and Altair bind= controls use Streamlit fonts, colors, and focus rings (#16813).
• 🪰 Bug fix: Vega-Lite legend titles get more padding under the Streamlit theme, so the title is not stuck to the first entry (#16818).
• 🦠 Bug fix: Elements stay dimmed after you press Stop, until the run actually finishes (#16839, #9904).
• 🦟 Bug fix: st.query_params skips a browser history entry when the query string does not change, so the Back button leaves the app (#16831, #9878).
• 🦂 Bug fix: Custom Components v2 keep in-flight trigger values, so the value reaches Python instead of the script rerunning without it (#16833, #16732).
• 🦗 Bug fix: st.download_button encodes filenames that a quoted Content-Disposition header cannot hold, so the browser saves the full name (#16646, #16631).
• 🕸️ Bug fix: st.slider swaps reversed min_value and max_value bounds, instead of truncating the range or raising an error about numbers you never passed (#16716, #16675).
• 🐌 Bug fix: st.number_input raises a clear error when min_value is greater than max_value (#16895).
• 🦎 Bug fix: Widgets raise an actionable error for an on_change mode they do not support (#16889).
• 🦀 Bug fix: Streamlit classifies invalid icon= values more precisely, so an empty value means no icon and a URL raises an image error (#16900).
• 🐛 Bug fix: The error for a nested url_path names the invalid path and links to the issue you can upvote (#16896).
• 🦋 Bug fix: Exception traces in the browser hide Streamlit package frames, keep your st.* call site, and show chained exceptions (#16718).
• 🪲 Bug fix: Coalesced reruns dispatch only the callbacks that have not run yet (#16765).
• 🐜 Bug fix: st.button and similar controls wait 500ms before they show a help tooltip on hover, so a pointer that crosses a control does not open one (#16794, #8686).
• 🐝 Bug fix: st.radio exposes option captions as descriptions, so assistive tech reads the option text as the name (#16811).
• 🐞 Bug fix: st.cache_resource rejects async validate and on_release callbacks, instead of discarding the awaitable they return (#16860).
• 🕷️ Bug fix: AppTest treats unknown element subtypes as UnknownElement, so .run() finishes against a newer Streamlit (#16835).
• 🪳 Bug fix: AppTest raises AppTestError when you call set_value() or click() on an element with no typed wrapper (#16837).
• 🪰 Bug fix: AppTest treats an empty st.chat_input submit as a real value, and prints ChatInputValue without an error when accept_file=True (#16857).
• 🦠 Bug fix: AppTest.session_state supports the same dict methods as st.session_state, which are get, keys, items, values, to_dict, len, and iteration (#16897).
• 🦟 Bug fix: streamlit skills installs the bundled agent skills where Claude Code reads them, and reports an incomplete install instead of success (#16394).

Older versions of Streamlit

• 2026 release notes
• 2025 release notes
• 2024 release notes
• 2023 release notes
• 2022 release notes
• 2021 release notes
• 2020 release notes
• 2019 release notes