# Flushing binder nbviewer cache

**URL:** <https://discourse.jupyter.org/t/flushing-binder-nbviewer-cache/4332>\
**Category:** General\
**Created:** [May 10, 2020, 4:24pm UTC](https://discourse.jupyter.org/t/flushing-binder-nbviewer-cache/4332 "2020-05-10T16:24:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![phoenix-anna](https://avatars.discourse-cdn.com/v4/letter/p/9fc29f/32.png) [@phoenix-anna](https://discourse.jupyter.org/u/phoenix-anna)\
**Post date:** [May 10, 2020, 4:24pm UTC](https://discourse.jupyter.org/t/flushing-binder-nbviewer-cache/4332/1 "2020-05-10T16:24:04Z")

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It wants to use an old version of my Jupyter notebook. The help says I can append flush\_cache=true to the URL to flush the cache, but this gives me a 404 error. How can I flush the cache?