Change version to 1.0.0-M1
diff --git a/README.md b/README.md
index b4efce8..698489a 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@
 ### Resources
 
 <!--- BROOKLYN_VERSION_BELOW -->
-The **[Developers](https://brooklyn.apache.org/developers/)** section of the main website contains more detail on working with the codebase. There is also a more **Developer Guide** specific to each version, including [this branch (1.0.0-SNAPSHOT)](https://brooklyn.apache.org/v/1.0.0-SNAPSHOT/dev/), [latest stable](https://brooklyn.apache.org/v/latest/dev/), and [older releases](https://brooklyn.apache.org/meta/versions.html).
+The **[Developers](https://brooklyn.apache.org/developers/)** section of the main website contains more detail on working with the codebase. There is also a more **Developer Guide** specific to each version, including [this branch (1.0.0-M1)](https://brooklyn.apache.org/v/1.0.0-M1/dev/), [latest stable](https://brooklyn.apache.org/v/latest/dev/), and [older releases](https://brooklyn.apache.org/meta/versions.html).
 
 Useful topics include:
 
@@ -56,7 +56,7 @@
 * the **[maven build](http://brooklyn.apache.org/v/latest/dev/env/maven-build.html)** and what to do on build errors
 
 <!--- BROOKLYN_VERSION_BELOW -->
-* **[project structure](https://brooklyn.apache.org/v/1.0.0-SNAPSHOT/dev/code/structure.html)** of the codebase and submodules
+* **[project structure](https://brooklyn.apache.org/v/1.0.0-M1/dev/code/structure.html)** of the codebase and submodules
 
 * the **[people](https://brooklyn.apache.org/community/)** behind Apache Brooklyn
 
diff --git a/pom.xml b/pom.xml
index 49123c8..7f07535 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,7 +30,7 @@
 
     <groupId>org.apache.brooklyn</groupId>
     <artifactId>brooklyn</artifactId>
-    <version>1.0.0-SNAPSHOT</version>  <!-- BROOKLYN_VERSION -->
+    <version>1.0.0-M1</version>  <!-- BROOKLYN_VERSION -->
     <packaging>pom</packaging>
 
     <name>Brooklyn Root</name>