diff --git a/pom.xml b/pom.xml
index 9bfc505..2fea5b4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
         <version>7</version>
     </parent>
     <groupId>us.codecraft</groupId>
-    <version>0.5.0</version>
+    <version>0.5.1-SNAPSHOT</version>
     <modelVersion>4.0.0</modelVersion>
     <packaging>pom</packaging>
     <properties>
diff --git a/webmagic-avalon/pom.xml b/webmagic-avalon/pom.xml
index 39a5ac5..8232103 100644
--- a/webmagic-avalon/pom.xml
+++ b/webmagic-avalon/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>webmagic-parent</artifactId>
         <groupId>us.codecraft</groupId>
-        <version>0.5.0</version>
+        <version>0.5.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/webmagic-avalon/webmagic-admin/pom.xml b/webmagic-avalon/webmagic-admin/pom.xml
index 020ca8a..ed364c1 100644
--- a/webmagic-avalon/webmagic-admin/pom.xml
+++ b/webmagic-avalon/webmagic-admin/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>webmagic-avalon</artifactId>
         <groupId>us.codecraft</groupId>
-        <version>0.5.0</version>
+        <version>0.5.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/webmagic-avalon/webmagic-avalon-common/pom.xml b/webmagic-avalon/webmagic-avalon-common/pom.xml
index 0125b19..3b06899 100644
--- a/webmagic-avalon/webmagic-avalon-common/pom.xml
+++ b/webmagic-avalon/webmagic-avalon-common/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>webmagic-avalon</artifactId>
         <groupId>us.codecraft</groupId>
-        <version>0.5.0</version>
+        <version>0.5.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/webmagic-avalon/webmagic-worker/pom.xml b/webmagic-avalon/webmagic-worker/pom.xml
index f085c82..ebc5174 100644
--- a/webmagic-avalon/webmagic-worker/pom.xml
+++ b/webmagic-avalon/webmagic-worker/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>webmagic-avalon</artifactId>
         <groupId>us.codecraft</groupId>
-        <version>0.5.0</version>
+        <version>0.5.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/webmagic-core/pom.xml b/webmagic-core/pom.xml
index eb47d59..407f266 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>0.5.0</version>
+        <version>0.5.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/webmagic-extension/pom.xml b/webmagic-extension/pom.xml
index c6629a4..3c97d4b 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>0.5.0</version>
+        <version>0.5.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/webmagic-samples/pom.xml b/webmagic-samples/pom.xml
index 4769c21..ee71ce8 100644
--- a/webmagic-samples/pom.xml
+++ b/webmagic-samples/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>webmagic-parent</artifactId>
         <groupId>us.codecraft</groupId>
-        <version>0.5.0</version>
+        <version>0.5.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/webmagic-saxon/pom.xml b/webmagic-saxon/pom.xml
index a0aa2cb..8ebc8af 100644
--- a/webmagic-saxon/pom.xml
+++ b/webmagic-saxon/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>webmagic-parent</artifactId>
         <groupId>us.codecraft</groupId>
-        <version>0.5.0</version>
+        <version>0.5.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/webmagic-scripts/pom.xml b/webmagic-scripts/pom.xml
index 943165e..0272c57 100755
--- a/webmagic-scripts/pom.xml
+++ b/webmagic-scripts/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>webmagic-parent</artifactId>
         <groupId>us.codecraft</groupId>
-        <version>0.5.0</version>
+        <version>0.5.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/webmagic-selenium/pom.xml b/webmagic-selenium/pom.xml
index 56d55d3..36a3fc0 100644
--- a/webmagic-selenium/pom.xml
+++ b/webmagic-selenium/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>webmagic-parent</artifactId>
         <groupId>us.codecraft</groupId>
-        <version>0.5.0</version>
+        <version>0.5.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>