# Update concrete 8.5.1 to concrete5 9.0.1
**URL:** https://forums.concretecms.org/t/update-concrete-8-5-1-to-concrete5-9-0-1/1981
**Category:** Developing with Concrete
**Created:** [December 20, 2021, 5:02pm UTC](https://forums.concretecms.org/t/update-concrete-8-5-1-to-concrete5-9-0-1/1981 "2021-12-20T17:02:31Z")
**Posts on this page:** 10
**Page:** 1
### Author:  [@AsnanBilal01](https://forums.concretecms.org/u/AsnanBilal01)
#### Post date: [December 20, 2021, 5:02pm UTC](https://forums.concretecms.org/t/update-concrete-8-5-1-to-concrete5-9-0-1/1981/1 "2021-12-20T17:02:31Z")
Hi
I am updating a site that is in concrete5 version 8.5.1 to concrete5 9.0.1 but I got errors.
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### Author:  [@JohntheFish](https://forums.concretecms.org/u/JohntheFish)
#### Post date: [December 20, 2021, 5:12pm UTC](https://forums.concretecms.org/t/update-concrete-8-5-1-to-concrete5-9-0-1/1981/2 "2021-12-20T17:12:53Z")
Have you confirmed all themes and addons used are v9 compatible?
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### Author:  [@AsnanBilal01](https://forums.concretecms.org/u/AsnanBilal01)
#### Post date: [December 20, 2021, 7:30pm UTC](https://forums.concretecms.org/t/update-concrete-8-5-1-to-concrete5-9-0-1/1981/3 "2021-12-20T19:30:08Z")
Yes John All themes and addons is compatible with v9.
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### Author:  [@enlil](https://forums.concretecms.org/u/enlil)
#### Post date: [December 20, 2021, 7:34pm UTC](https://forums.concretecms.org/t/update-concrete-8-5-1-to-concrete5-9-0-1/1981/4 "2021-12-20T19:34:39Z")
if i’m not mistaken, you should update to at least 8.5.6 before updating to 9…
Edit: You probably want to go 8.5.2 \> 8.5.7 \> 9
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### Author:  [@JohntheFish](https://forums.concretecms.org/u/JohntheFish)
#### Post date: [December 20, 2021, 7:35pm UTC](https://forums.concretecms.org/t/update-concrete-8-5-1-to-concrete5-9-0-1/1981/5 "2021-12-20T19:35:32Z")
Upgrade to v9 is not officially supported yet. Your best chance of success is to first upgrade to 8.5.7
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### Author:  [@AsnanBilal01](https://forums.concretecms.org/u/AsnanBilal01)
#### Post date: [December 20, 2021, 7:52pm UTC](https://forums.concretecms.org/t/update-concrete-8-5-1-to-concrete5-9-0-1/1981/6 "2021-12-20T19:52:54Z")
Yes Enlil and John
I tried to update the site to v8.5.2 but it comes with another error.
Error:
Unknown column type “datetime\_immutable” requested. Any Doctrine type that you use has to be registered with \Doctrine\DBAL\Types\Type::addType(). You can get a list of all the known types with \Doctrine\DBAL\Types\Type::getTypesMap(). If this error occurs during database introspection then you might have forgot to register all database types for a Doctrine Type. Use AbstractPlatform#registerDoctrineTypeMapping() or have your custom types implement Type#getMappedDatabaseTypes(). If the type name is empty you might have a problem with the cache or forgot some mapping information.
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### Author:  [@JohntheFish](https://forums.concretecms.org/u/JohntheFish)
#### Post date: [December 20, 2021, 8:25pm UTC](https://forums.concretecms.org/t/update-concrete-8-5-1-to-concrete5-9-0-1/1981/7 "2021-12-20T20:25:24Z")
Try skipping 8.5.2. So revert from a backup and then directly 8.5.1 to 8.5.7.
Many of the fixes between minor versions in 8.5.x were to do with bugs in the upgrade process.
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### Author:  [@AsnanBilal01](https://forums.concretecms.org/u/AsnanBilal01)
#### Post date: [December 20, 2021, 8:48pm UTC](https://forums.concretecms.org/t/update-concrete-8-5-1-to-concrete5-9-0-1/1981/8 "2021-12-20T20:48:31Z")
Jhon this comes when I want to update the website.
Have you any idea why this errors comes.
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### Author:  [@AsnanBilal01](https://forums.concretecms.org/u/AsnanBilal01)
#### Post date: [December 20, 2021, 8:53pm UTC](https://forums.concretecms.org/t/update-concrete-8-5-1-to-concrete5-9-0-1/1981/9 "2021-12-20T20:53:58Z")
The same
Error comes.
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### Author:  [@JohntheFish](https://forums.concretecms.org/u/JohntheFish)
#### Post date: [December 21, 2021, 9:22am UTC](https://forums.concretecms.org/t/update-concrete-8-5-1-to-concrete5-9-0-1/1981/10 "2021-12-21T09:22:36Z")
You could try with cache off and doctrine/entities in development mode.