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Many different build tools and Java IDEs use public Maven repositories to download dependencies. This page lists the Maven repositories where Clojure and contributed libraries may be found, and how to configure them in different build tools.

Leiningen Quick Start

To use Clojure and contrib library releases in your Leiningen project, there's nothing special to do. Just add dependencies in project.clj

To use Clojure and contrib library SNAPSHOTS in your Leiningen project, add the following to your project.clj:


A note about releases versus snapshots

Maven repositories distinguish between releases and snapshots.

Releases have fixed version strings, like 1.2.0 or 1.3.0-alpha5. Once it has been uploaded to a public repository, a release never changes.

Snapshots have version strings ending in -SNAPSHOT. Typically, snapshot version strings look like 1.1.0-SNAPSHOT, although Clojure the language adds the name of the git branch, like 1.3.0-master-SNAPSHOT. Snapshots are like tracking the latest version of a project in source control: they can change.

When a snapshot is uploaded to a public Maven repository, the -SNAPSHOT in the version string is replaced with a unique timestamp, so 1.3.0-master-SNAPSHOT would become something like 1.3.0-master-20110408.150223-52.

If you use a -SNAPSHOT version in your project dependencies, most Maven-based tools will automatically check for updated versions of that snapshot. (Maven itself allows you to disable this behavior with the -o option.) To pin your dependency at a specific snapshot version, use the full version string with the timestamp.

Clojure & Contrib library releases

New snapshots and releases are uploaded to the Sonatype open-source repository at

Releases are automatically sync'd from there to the Maven Central Repository at

How to configure release repositories

Nothing to do here. Maven-based tools, including Leiningen, always check the Maven Central Repository for releases.

It takes up to 24 hours for a new release to be sync'd from the Sonatype repository to Maven Central. If you want to get a new release sooner, use the same instructions as for snapshot repositories, below.

How to configure snapshot repositories in Leiningen

In a Leiningen project.clj file:

How to configure snapshot repositories in Gradle

In a Gradle build.gradle file:

How to configure snapshot repositories in Maven

In a Maven project's pom.xml file:

How to configure snapshot repositories globally in Maven

This only works if you are building your projects with Maven itself, not with Maven-based tools such as Leiningen.

In your ~/.m2/settings.xml file:

Historical Notes

Monolithic "clojure-contrib" after 1.2.0

After the 1.2.0 release, clojure-contrib was split into multiple sub-modules. This proved even more cumbersome than the monolithic clojure-contrib, and is being phased out. There is no plan to release clojure-contrib post-1.2.0 in either monolithic or modularized forms.

Instead, new development of "contrib" libraries is occurring in independent Git repositories. Each library can have its own version and release cycle, independent of Clojure. Snapshots and releases of these "new contribs" are uploaded to the public repository at and sync'd to Maven central just like Clojure itself.

Clojure and clojure-contrib releases 1.2.0 and earlier

For Clojure the language and clojure-contrib versions 1.0.0, 1.1.0, and 1.2.0, releases and snapshots were uploaded to a public repository at and respectively. These repositories are no longer active.

Clojure releases 1.0.0, 1.1.0, 1.2.0, and 1.2.1 were also manually uploaded to the Maven Central Repository.

Clojure-contrib releases 1.0.0, 1.1.0, and 1.2.0 were manually uploaded to the Maven Central Repository.