diff --git a/plugin.xml b/plugin.xml
index c1f355d3e..67363e256 100644
--- a/plugin.xml
+++ b/plugin.xml
@@ -6,7 +6,7 @@
 	<property name="kopf.branch" value="fess-5.0" />
 
 	<!-- Maven Repository -->
-	<property name="maven.snapshot.repo.url" value="https://oss.sonatype.org/content/repositories/snapshots" />
+	<property name="maven.snapshot.repo.url" value="https://oss.sonatype.org/content/repositories/releases" />
 	<property name="maven.release.repo.url" value="http://central.maven.org/maven2" />
 
 	<target name="install.plugins">
@@ -15,57 +15,57 @@
 		<mkdir dir="${plugins.dir}" />
 		<!-- analysis-fess -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="analysis-fess" />
-			<param name="plugin.version" value="5.2.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.2.0-20170202.050617-1" />
+			<param name="plugin.version" value="5.2.0" />
+			<param name="plugin.zip.version" value="5.2.0" />
 		</antcall>
 		<!-- analysis-ja -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="analysis-ja" />
-			<param name="plugin.version" value="5.2.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.2.0-20170202.050940-1" />
+			<param name="plugin.version" value="5.2.0" />
+			<param name="plugin.zip.version" value="5.2.0" />
 		</antcall>
 		<!-- analysis-synonym -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="analysis-synonym" />
-			<param name="plugin.version" value="5.2.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.2.0-20170202.051828-1" />
+			<param name="plugin.version" value="5.2.0" />
+			<param name="plugin.zip.version" value="5.2.0" />
 		</antcall>
 		<!-- configsync -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="configsync" />
-			<param name="plugin.version" value="5.2.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.2.0-20170202.093107-2" />
+			<param name="plugin.version" value="5.2.0" />
+			<param name="plugin.zip.version" value="5.2.0" />
 		</antcall>
 		<!-- dataformat -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="dataformat" />
-			<param name="plugin.version" value="5.2.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.2.0-20170202.052320-1" />
+			<param name="plugin.version" value="5.2.0" />
+			<param name="plugin.zip.version" value="5.2.0" />
 		</antcall>
 		<!-- langfield -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="langfield" />
-			<param name="plugin.version" value="5.2.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.2.0-20170202.052500-1" />
+			<param name="plugin.version" value="5.2.0" />
+			<param name="plugin.zip.version" value="5.2.0" />
 		</antcall>
 		<!-- kopf -->
 		<get dest="${target.dir}/kopf.zip">