diff --git a/akka-actor-tests/src/test/scala/akka/config/ConfigSpec.scala b/akka-actor-tests/src/test/scala/akka/config/ConfigSpec.scala
index 6d58c22718a..e2acad9e0e2 100644
--- a/akka-actor-tests/src/test/scala/akka/config/ConfigSpec.scala
+++ b/akka-actor-tests/src/test/scala/akka/config/ConfigSpec.scala
@@ -25,8 +25,8 @@ class ConfigSpec extends AkkaSpec(ConfigFactory.defaultReference(ActorSystem.fin
       {
         import config._
 
-        getString("akka.version") must equal("2.1-SNAPSHOT")
-        settings.ConfigVersion must equal("2.1-SNAPSHOT")
+        getString("akka.version") must equal("2.1-M1")
+        settings.ConfigVersion must equal("2.1-M1")
 
         getBoolean("akka.daemonic") must equal(false)
         getBoolean("akka.actor.serialize-messages") must equal(false)
diff --git a/akka-actor/src/main/resources/reference.conf b/akka-actor/src/main/resources/reference.conf
index 7bedfa3f020..f4d6c7092ce 100644
--- a/akka-actor/src/main/resources/reference.conf
+++ b/akka-actor/src/main/resources/reference.conf
@@ -7,7 +7,7 @@
 
 akka {
   # Akka version, checked against the runtime version of Akka.
-  version = "2.1-SNAPSHOT"
+  version = "2.1-M1"
 
   # Home directory of Akka, modules in the deploy directory will be loaded
   home = ""
diff --git a/akka-actor/src/main/scala/akka/actor/ActorSystem.scala b/akka-actor/src/main/scala/akka/actor/ActorSystem.scala
index ef23305b832..2bc024d58d5 100644
--- a/akka-actor/src/main/scala/akka/actor/ActorSystem.scala
+++ b/akka-actor/src/main/scala/akka/actor/ActorSystem.scala
@@ -21,7 +21,7 @@ import akka.actor.cell.ChildrenContainer
 
 object ActorSystem {
 
-  val Version: String = "2.1-SNAPSHOT"
+  val Version: String = "2.1-M1"
 
   val EnvHome: Option[String] = System.getenv("AKKA_HOME") match {
     case null | "" | "." ⇒ None
diff --git a/akka-docs/conf.py b/akka-docs/conf.py
index 77b7c80be08..b1bb8e22f86 100644
--- a/akka-docs/conf.py
+++ b/akka-docs/conf.py
@@ -17,8 +17,8 @@
 
 project = u'Akka'
 copyright = u'2011, Typesafe Inc'
-version = '2.1-SNAPSHOT'
-release = '2.1-SNAPSHOT'
+version = '2.1-M1'
+release = '2.1-M1'
 
 pygments_style = 'simple'
 highlight_language = 'scala'
diff --git a/akka-docs/dev/multi-jvm-testing.rst b/akka-docs/dev/multi-jvm-testing.rst
index 0ba053d2a4f..1bd8f3bc783 100644
--- a/akka-docs/dev/multi-jvm-testing.rst
+++ b/akka-docs/dev/multi-jvm-testing.rst
@@ -46,7 +46,7 @@ multi-JVM testing::
 
      lazy val buildSettings = Defaults.defaultSettings ++ Seq(
        organization := "com.typesafe.akka",
-       version      := "2.1-SNAPSHOT",
+       version      := "2.1-M1",
        scalaVersion := "2.9.1",
        crossPaths   := false
      )
diff --git a/akka-docs/intro/getting-started.rst b/akka-docs/intro/getting-started.rst
index f96bb42b9df..ed263999b9e 100644
--- a/akka-docs/intro/getting-started.rst
+++ b/akka-docs/intro/getting-started.rst
@@ -31,16 +31,16 @@ Modules
 
 Akka is very modular and has many JARs for containing different features.
 
-- ``akka-actor-2.1-SNAPSHOT.jar`` -- Classic Actors, Typed Actors, IO Actor etc.
-- ``akka-remote-2.1-SNAPSHOT.jar`` -- Remote Actors
-- ``akka-testkit-2.1-SNAPSHOT.jar`` -- Toolkit for testing Actor systems
-- ``akka-kernel-2.1-SNAPSHOT.jar`` -- Akka microkernel for running a bare-bones mini application server
-- ``akka-transactor-2.1-SNAPSHOT.jar`` -- Transactors - transactional actors, integrated with Scala STM
-- ``akka-agent-2.1-SNAPSHOT.jar`` -- Agents, integrated with Scala STM
-- ``akka-camel-2.1-SNAPSHOT.jar`` -- Apache Camel integration
-- ``akka-zeromq-2.1-SNAPSHOT.jar`` -- ZeroMQ integration
-- ``akka-slf4j-2.1-SNAPSHOT.jar`` -- SLF4J Event Handler Listener
-- ``akka-<storage-system>-mailbox-2.1-SNAPSHOT.jar`` -- Akka durable mailboxes
+- ``akka-actor-2.1-M1.jar`` -- Classic Actors, Typed Actors, IO Actor etc.
+- ``akka-remote-2.1-M1.jar`` -- Remote Actors
+- ``akka-testkit-2.1-M1.jar`` -- Toolkit for testing Actor systems
+- ``akka-kernel-2.1-M1.jar`` -- Akka microkernel for running a bare-bones mini application server
+- ``akka-transactor-2.1-M1.jar`` -- Transactors - transactional actors, integrated with Scala STM
+- ``akka-agent-2.1-M1.jar`` -- Agents, integrated with Scala STM
+- ``akka-camel-2.1-M1.jar`` -- Apache Camel integration
+- ``akka-zeromq-2.1-M1.jar`` -- ZeroMQ integration
+- ``akka-slf4j-2.1-M1.jar`` -- SLF4J Event Handler Listener
+- ``akka-<storage-system>-mailbox-2.1-M1.jar`` -- Akka durable mailboxes
 
 How to see the JARs dependencies of each Akka module is described in the
 :ref:`dependencies` section.
@@ -96,14 +96,14 @@ Summary of the essential parts for using Akka with Maven:
     <url>http://repo.typesafe.com/typesafe/releases/</url>
   </repository>
 
-2) Add the Akka dependencies. For example, here is the dependency for Akka Actor 2.1-SNAPSHOT:
+2) Add the Akka dependencies. For example, here is the dependency for Akka Actor 2.1-M1:
 
 .. code-block:: xml
 
   <dependency>
     <groupId>com.typesafe.akka</groupId>
     <artifactId>akka-actor</artifactId>
-    <version>2.1-SNAPSHOT</version>
+    <version>2.1-M1</version>
   </dependency>
 
 **Note**: for snapshot versions both ``SNAPSHOT`` and timestamped versions are published.
@@ -130,7 +130,7 @@ SBT installation instructions on `https://github.com/harrah/xsbt/wiki/Setup <htt
 
     resolvers += "Typesafe Repository" at "http://repo.typesafe.com/typesafe/releases/"
 
-    libraryDependencies += "com.typesafe.akka" % "akka-actor" % "2.1-SNAPSHOT"
+    libraryDependencies += "com.typesafe.akka" % "akka-actor" % "2.1-M1"
 
 
 Using Akka with Eclipse
diff --git a/akka-docs/java/remoting.rst b/akka-docs/java/remoting.rst
index 82a736973f8..c46d1945b8f 100644
--- a/akka-docs/java/remoting.rst
+++ b/akka-docs/java/remoting.rst
@@ -14,7 +14,7 @@ The Akka remoting is a separate jar file. Make sure that you have the following
   <dependency>
     <groupId>com.typesafe.akka</groupId>
     <artifactId>akka-remote</artifactId>
-    <version>2.1-SNAPSHOT</version>
+    <version>2.1-M1</version>
   </dependency>
 
 To enable remote capabilities in your Akka project you should, at a minimum, add the following changes
diff --git a/akka-docs/modules/camel.rst b/akka-docs/modules/camel.rst
index 68686ce5862..498a9fa7bfa 100644
--- a/akka-docs/modules/camel.rst
+++ b/akka-docs/modules/camel.rst
@@ -6,7 +6,7 @@
 #######
 
 .. note::
-    The Akka Camel module has not been migrated to Akka 2.1-SNAPSHOT yet.
+    The Akka Camel module has not been migrated to Akka 2.1-M1 yet.
 
     It might not make it into Akka 2.0 final but will then hopefully be
     re-introduce in an upcoming release. It might also be backported to
diff --git a/akka-docs/modules/durable-mailbox.rst b/akka-docs/modules/durable-mailbox.rst
index 5be40320d07..3f7810be78f 100644
--- a/akka-docs/modules/durable-mailbox.rst
+++ b/akka-docs/modules/durable-mailbox.rst
@@ -94,11 +94,11 @@ added in concrete subclass like this:
 .. includecode:: code/docs/actor/mailbox/DurableMailboxDocSpec.scala
    :include: custom-mailbox-test
 
-You find DurableMailboxDocSpec in ``akka-mailboxes-common-test-2.1-SNAPSHOT.jar``.
+You find DurableMailboxDocSpec in ``akka-mailboxes-common-test-2.1-M1.jar``.
 Add this dependency::
 
-  "com.typesafe.akka" % "akka-mailboxes-common-test" % "2.1-SNAPSHOT"
+  "com.typesafe.akka" % "akka-mailboxes-common-test" % "2.1-M1"
 
 For more inspiration you can look at the old implementations based on Redis, MongoDB, Beanstalk,
 and ZooKeeper, which can be found in Akka git repository tag
-`v2.0.1 <https://github.com/akka/akka/tree/v2.0.1/akka-durable-mailboxes>`_.
\ No newline at end of file
+`v2.0.1 <https://github.com/akka/akka/tree/v2.0.1/akka-durable-mailboxes>`_.
diff --git a/akka-docs/scala/remoting.rst b/akka-docs/scala/remoting.rst
index ab49765fad4..a8ec8f637dd 100644
--- a/akka-docs/scala/remoting.rst
+++ b/akka-docs/scala/remoting.rst
@@ -12,7 +12,7 @@ Preparing your ActorSystem for Remoting
 
 The Akka remoting is a separate jar file. Make sure that you have the following dependency in your project::
 
-  "com.typesafe.akka" % "akka-remote" % "2.1-SNAPSHOT"
+  "com.typesafe.akka" % "akka-remote" % "2.1-M1"
 
 To enable remote capabilities in your Akka project you should, at a minimum, add the following changes
 to your ``application.conf`` file::
diff --git a/akka-kernel/src/main/dist/README b/akka-kernel/src/main/dist/README
index d15368f6968..2835ca3647c 100644
--- a/akka-kernel/src/main/dist/README
+++ b/akka-kernel/src/main/dist/README
@@ -2,7 +2,7 @@
 Akka
 ====
 
-This is the Akka 2.1-SNAPSHOT download.
+This is the Akka 2.1-M1 download.
 
 Included are all libraries, documentation, and sources for Akka.
 
diff --git a/akka-kernel/src/main/dist/config/application.conf b/akka-kernel/src/main/dist/config/application.conf
index 4abcd7e7f81..a8f33b54a3d 100644
--- a/akka-kernel/src/main/dist/config/application.conf
+++ b/akka-kernel/src/main/dist/config/application.conf
@@ -1,3 +1,3 @@
 # In this file you can override any option defined in the 'reference.conf' files.
 # Copy in all or parts of the 'reference.conf' files and modify as you please.
-# For more info about config, please visit the Akka Documentation: http://akka.io/docs/akka/2.1-SNAPSHOT/
+# For more info about config, please visit the Akka Documentation: http://akka.io/docs/akka/2.1-M1/
diff --git a/akka-sbt-plugin/sample/project/Build.scala b/akka-sbt-plugin/sample/project/Build.scala
index 959f98511e0..c6b398e5360 100644
--- a/akka-sbt-plugin/sample/project/Build.scala
+++ b/akka-sbt-plugin/sample/project/Build.scala
@@ -6,7 +6,7 @@ import akka.sbt.AkkaKernelPlugin.{ Dist, outputDirectory, distJvmOptions}
 
 object HelloKernelBuild extends Build {
   val Organization = "akka.sample"
-  val Version      = "2.1-SNAPSHOT"
+  val Version      = "2.1-M1"
   val ScalaVersion = "2.9.1"
 
   lazy val HelloKernel = Project(
@@ -49,7 +49,7 @@ object Dependencies {
 object Dependency {
   // Versions
   object V {
-    val Akka      = "2.1-SNAPSHOT"
+    val Akka      = "2.1-M1"
   }
 
   val akkaKernel        = "com.typesafe.akka" % "akka-kernel"        % V.Akka
diff --git a/akka-sbt-plugin/sample/project/plugins.sbt b/akka-sbt-plugin/sample/project/plugins.sbt
index 3f814e328ea..237d4d2b210 100644
--- a/akka-sbt-plugin/sample/project/plugins.sbt
+++ b/akka-sbt-plugin/sample/project/plugins.sbt
@@ -1,3 +1,3 @@
 resolvers += "Typesafe Repo" at "http://repo.typesafe.com/typesafe/releases/"
 
-addSbtPlugin("com.typesafe.akka" % "akka-sbt-plugin" % "2.1-SNAPSHOT")
+addSbtPlugin("com.typesafe.akka" % "akka-sbt-plugin" % "2.1-M1")
diff --git a/project/AkkaBuild.scala b/project/AkkaBuild.scala
index d9a3eaa9ec5..85251832d5f 100644
--- a/project/AkkaBuild.scala
+++ b/project/AkkaBuild.scala
@@ -23,7 +23,7 @@ object AkkaBuild extends Build {
 
   lazy val buildSettings = Seq(
     organization := "com.typesafe.akka",
-    version      := "2.1-SNAPSHOT",
+    version      := "2.1-M1",
     scalaVersion := "2.10.0-M6"
   )