diff --git a/doma-spring-boot-autoconfigure/pom.xml b/doma-spring-boot-autoconfigure/pom.xml
index 52b33add..389827a1 100644
--- a/doma-spring-boot-autoconfigure/pom.xml
+++ b/doma-spring-boot-autoconfigure/pom.xml
@@ -12,7 +12,7 @@
     <parent>
         <groupId>org.seasar.doma.boot</groupId>
         <artifactId>doma-spring-boot</artifactId>
-        <version>2.1.0</version>
+        <version>2.2.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/doma-spring-boot-core/pom.xml b/doma-spring-boot-core/pom.xml
index 0c37a5c8..3e1a7eeb 100644
--- a/doma-spring-boot-core/pom.xml
+++ b/doma-spring-boot-core/pom.xml
@@ -12,7 +12,7 @@
     <parent>
         <groupId>org.seasar.doma.boot</groupId>
         <artifactId>doma-spring-boot</artifactId>
-        <version>2.1.0</version>
+        <version>2.2.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/doma-spring-boot-samples/doma-spring-boot-sample-entity-listener/pom.xml b/doma-spring-boot-samples/doma-spring-boot-sample-entity-listener/pom.xml
index 1d6b7d7f..fae5009a 100644
--- a/doma-spring-boot-samples/doma-spring-boot-sample-entity-listener/pom.xml
+++ b/doma-spring-boot-samples/doma-spring-boot-sample-entity-listener/pom.xml
@@ -12,7 +12,7 @@
     <parent>
         <groupId>org.seasar.doma.boot</groupId>
         <artifactId>doma-spring-boot-samples</artifactId>
-        <version>2.1.0</version>
+        <version>2.2.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/doma-spring-boot-samples/doma-spring-boot-sample-event-handler/pom.xml b/doma-spring-boot-samples/doma-spring-boot-sample-event-handler/pom.xml
index 8f9108be..ea6588d8 100644
--- a/doma-spring-boot-samples/doma-spring-boot-sample-event-handler/pom.xml
+++ b/doma-spring-boot-samples/doma-spring-boot-sample-event-handler/pom.xml
@@ -12,7 +12,7 @@
     <parent>
         <groupId>org.seasar.doma.boot</groupId>
         <artifactId>doma-spring-boot-samples</artifactId>
-        <version>2.1.0</version>
+        <version>2.2.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/doma-spring-boot-samples/doma-spring-boot-sample-simple/pom.xml b/doma-spring-boot-samples/doma-spring-boot-sample-simple/pom.xml
index b431696a..c8d6594e 100644
--- a/doma-spring-boot-samples/doma-spring-boot-sample-simple/pom.xml
+++ b/doma-spring-boot-samples/doma-spring-boot-sample-simple/pom.xml
@@ -12,7 +12,7 @@
     <parent>
         <groupId>org.seasar.doma.boot</groupId>
         <artifactId>doma-spring-boot-samples</artifactId>
-        <version>2.1.0</version>
+        <version>2.2.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/doma-spring-boot-samples/doma-spring-boot-sample-two-datasource/pom.xml b/doma-spring-boot-samples/doma-spring-boot-sample-two-datasource/pom.xml
index 25dbf821..ea9d0946 100644
--- a/doma-spring-boot-samples/doma-spring-boot-sample-two-datasource/pom.xml
+++ b/doma-spring-boot-samples/doma-spring-boot-sample-two-datasource/pom.xml
@@ -12,7 +12,7 @@
 	<parent>
 		<groupId>org.seasar.doma.boot</groupId>
 		<artifactId>doma-spring-boot-samples</artifactId>
-		<version>2.1.0</version>
+		<version>2.2.0-SNAPSHOT</version>
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 
diff --git a/doma-spring-boot-samples/pom.xml b/doma-spring-boot-samples/pom.xml
index 94f02956..86fdc596 100644
--- a/doma-spring-boot-samples/pom.xml
+++ b/doma-spring-boot-samples/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <artifactId>doma-spring-boot</artifactId>
         <groupId>org.seasar.doma.boot</groupId>
-        <version>2.1.0</version>
+        <version>2.2.0-SNAPSHOT</version>
     </parent>
     <packaging>pom</packaging>
     <modelVersion>4.0.0</modelVersion>
diff --git a/doma-spring-boot-starter/pom.xml b/doma-spring-boot-starter/pom.xml
index f0b94cf1..7b792d01 100644
--- a/doma-spring-boot-starter/pom.xml
+++ b/doma-spring-boot-starter/pom.xml
@@ -12,7 +12,7 @@
     <parent>
         <groupId>org.seasar.doma.boot</groupId>
         <artifactId>doma-spring-boot</artifactId>
-        <version>2.1.0</version>
+        <version>2.2.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/pom.xml b/pom.xml
index fef98fac..daffaa44 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>org.seasar.doma.boot</groupId>
     <artifactId>doma-spring-boot</artifactId>
-    <version>2.1.0</version>
+    <version>2.2.0-SNAPSHOT</version>
     <packaging>pom</packaging>
 
     <name>doma-spring-boot</name>