Missing Artifact Spring data cassandra 1.5.0M1

Question

I try to use spring data cassandra 1.5.0 but when i update my pom by adding

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-cassandra</artifactId>
    <version>1.5.0.M1</version>
</dependency>

<repositories>
<repository>
    <id>spring-milestones</id>
    <name>Spring Milestones</name>
    <url>https://repo.spring.io/libs-milestone</url>
    <snapshots>
        <enabled>false</enabled>
    </snapshots>
</repository>

But i got error

Missing artifact org.springframework.data:spring-data-cassandra:jar:1.5.0.M1

I have to use this version because of its support for cassandra 3.0.

The question is how could I use this version?