diff --git a/pom.xml b/pom.xml
index aeb54f6..a5d31ae 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
         <version>7</version>
     </parent>
     <groupId>us.codecraft</groupId>
-    <version>0.2.2-SNAPSHOT</version>
+    <version>0.2.1-SNAPSHOT</version>
     <modelVersion>4.0.0</modelVersion>
     <packaging>pom</packaging>
     <artifactId>webmagic-parent</artifactId>
diff --git a/release.properties b/release.properties
new file mode 100644
index 0000000..86e7224
--- /dev/null
+++ b/release.properties
@@ -0,0 +1,11 @@
+#release configuration
+#Tue Aug 20 23:36:56 CST 2013
+scm.tagNameFormat=@{project.artifactId}-@{project.version}
+pushChanges=true
+scm.url=scm\:git\:git@github.com\:code4craft/webmagic.git
+preparationGoals=clean verify
+remoteTagging=true
+scm.commentPrefix=[maven-release-plugin] 
+exec.additionalArguments=-Psonatype-oss-release -P development
+exec.snapshotReleasePluginAllowed=false
+completedPhase=check-poms
diff --git a/webmagic-core/pom.xml b/webmagic-core/pom.xml
index b19820d..4833192 100644
--- a/webmagic-core/pom.xml
+++ b/webmagic-core/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>us.codecraft</groupId>
         <artifactId>webmagic-parent</artifactId>
-        <version>0.2.2-SNAPSHOT</version>
+        <version>0.2.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/webmagic-extension/pom.xml b/webmagic-extension/pom.xml
index 1914b71..4d856fa 100644
--- a/webmagic-extension/pom.xml
+++ b/webmagic-extension/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>us.codecraft</groupId>
         <artifactId>webmagic-parent</artifactId>
-        <version>0.2.2-SNAPSHOT</version>
+        <version>0.2.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>