diff --git a/dbflute.xml b/dbflute.xml
index d0f44a941..e743ff77c 100644
--- a/dbflute.xml
+++ b/dbflute.xml
@@ -2,7 +2,7 @@
 <project name="dbflute" basedir=".">
 	<property name="mydbflute.dir" value="${basedir}/mydbflute" />
 	<property name="target.dir" value="${basedir}/target" />
-	<property name="branch.name" value="fess-14.14" />
+	<property name="branch.name" value="fess-14.15" />
 	<property name="mydbflute.url" value="https://github.com/lastaflute/lastaflute-example-waterfront/archive/${branch.name}.zip" />
 
 	<target name="mydbflute.check">
diff --git a/module.xml b/module.xml
index 1b89b3bdf..197bf0600 100644
--- a/module.xml
+++ b/module.xml
@@ -6,7 +6,7 @@
 	<!-- Maven Repository -->
 	<property name="maven.snapshot.repo.url" value="https://maven.codelibs.org/" />
 	<property name="maven.release.repo.url" value="https://maven.codelibs.org/" />
-	<property name="opensearch.version" value="2.14.0" />
+	<property name="opensearch.version" value="2.15.0" />
 
 	<target name="install.modules">
 		<mkdir dir="${target.dir}" />
diff --git a/plugin.xml b/plugin.xml
index 525425855..bd20a13ac 100644
--- a/plugin.xml
+++ b/plugin.xml
@@ -17,8 +17,8 @@
 			<param name="plugin.groupId" value="org/codelibs/opensearch" />
 			<param name="plugin.name.prefix" value="opensearch-" />
 			<param name="plugin.name" value="analysis-extension" />
-			<param name="plugin.version" value="2.14.0" />
-			<param name="plugin.zip.version" value="2.14.0" />
+			<param name="plugin.version" value="2.15.0" />
+			<param name="plugin.zip.version" value="2.15.0" />
 		</antcall>
 		<!-- analysis-fess -->
 		<antcall target="install.plugin">
@@ -26,8 +26,8 @@
 			<param name="plugin.groupId" value="org/codelibs/opensearch" />
 			<param name="plugin.name.prefix" value="opensearch-" />
 			<param name="plugin.name" value="analysis-fess" />
-			<param name="plugin.version" value="2.14.0" />
-			<param name="plugin.zip.version" value="2.14.0" />
+			<param name="plugin.version" value="2.15.0" />
+			<param name="plugin.zip.version" value="2.15.0" />
 		</antcall>
 		<!-- configsync -->
 		<antcall target="install.plugin">
@@ -35,8 +35,8 @@
 			<param name="plugin.groupId" value="org/codelibs/opensearch" />
 			<param name="plugin.name.prefix" value="opensearch-" />
 			<param name="plugin.name" value="configsync" />
-			<param name="plugin.version" value="2.14.0" />
-			<param name="plugin.zip.version" value="2.14.0" />
+			<param name="plugin.version" value="2.15.0" />
+			<param name="plugin.zip.version" value="2.15.0" />
 		</antcall>
 		<!-- minhash -->
 		<antcall target="install.plugin">
@@ -44,8 +44,8 @@
 			<param name="plugin.groupId" value="org/codelibs/opensearch" />
 			<param name="plugin.name.prefix" value="opensearch-" />
 			<param name="plugin.name" value="minhash" />
-			<param name="plugin.version" value="2.14.0" />
-			<param name="plugin.zip.version" value="2.14.0" />
+			<param name="plugin.version" value="2.15.0" />
+			<param name="plugin.zip.version" value="2.15.0" />
 		</antcall>
 
 		<antcall target="remove.jars" />