why does Intellij not displays the newest version of a dependency?

A great function of github is telling dependencies that have a security issue. 

I tried to update to the version recommended, but in the IDE I always got much older versions displayed. 

Current example: 

There exists https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind/2.10.5.1

but when I set 

<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.10.5.1</version>

I get 

Could not find artifact com.fasterxml.jackson.core:jackson-core:pom:2.10.5.1 in central (https://repo.maven.apache.org/maven2)

Does that mean with maven2 an old outdated repo is assigned (I'm not aware that I have set this maven2 on purpose...)? If so, where do I have to change this?

Thanks for help

Markus