diff --git a/plugin.xml b/plugin.xml
index 99e0029cb..1ccc21699 100644
--- a/plugin.xml
+++ b/plugin.xml
@@ -15,66 +15,66 @@
 		<mkdir dir="${plugins.dir}" />
 		<!-- analysis-fess -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="analysis-fess" />
-			<param name="plugin.version" value="5.6.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.6.0-20170913.212424-1" />
+			<param name="plugin.version" value="5.6.0" />
+			<param name="plugin.zip.version" value="5.6.0" />
 		</antcall>
 		<!-- analysis-ja -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="analysis-ja" />
-			<param name="plugin.version" value="5.6.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.6.0-20170913.212824-1" />
+			<param name="plugin.version" value="5.6.0" />
+			<param name="plugin.zip.version" value="5.6.0" />
 		</antcall>
 		<!-- analysis-synonym -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="analysis-synonym" />
-			<param name="plugin.version" value="5.6.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.6.0-20170913.213805-1" />
+			<param name="plugin.version" value="5.6.0" />
+			<param name="plugin.zip.version" value="5.6.0" />
 		</antcall>
 		<!-- configsync -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="configsync" />
-			<param name="plugin.version" value="5.6.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.6.0-20170913.214030-1" />
+			<param name="plugin.version" value="5.6.0" />
+			<param name="plugin.zip.version" value="5.6.0" />
 		</antcall>
 		<!-- dataformat -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="dataformat" />
-			<param name="plugin.version" value="5.6.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.6.0-20170913.214128-1" />
+			<param name="plugin.version" value="5.6.0" />
+			<param name="plugin.zip.version" value="5.6.0" />
 		</antcall>
 		<!-- langfield -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="langfield" />
-			<param name="plugin.version" value="5.6.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.6.0-20170913.214529-1" />
+			<param name="plugin.version" value="5.6.0" />
+			<param name="plugin.zip.version" value="5.6.0" />
 		</antcall>
 		<!-- minhash -->
 		<antcall target="install.plugin">
-			<param name="repo.url" value="${maven.snapshot.repo.url}" />
+			<param name="repo.url" value="${maven.release.repo.url}" />
 			<param name="plugin.groupId" value="org/codelibs" />
 			<param name="plugin.name.prefix" value="elasticsearch-" />
 			<param name="plugin.name" value="minhash" />
-			<param name="plugin.version" value="5.6.0-SNAPSHOT" />
-			<param name="plugin.zip.version" value="5.6.0-20170913.214832-1" />
+			<param name="plugin.version" value="5.6.0" />
+			<param name="plugin.zip.version" value="5.6.0" />
 		</antcall>
 		<!-- kopf -->
 		<get dest="${target.dir}/kopf.zip">
diff --git a/pom.xml b/pom.xml
index ef41340a3..ea0f9a5a4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -47,7 +47,7 @@
 
 		<!-- Partner Library -->
 		<slf4j.version>1.7.25</slf4j.version>
-		<log4j.version>2.8.2</log4j.version>
+		<log4j.version>2.9.0</log4j.version>
 		<jackson.version>2.8.6</jackson.version>
 		<commons.fileupload.version>1.3.2</commons.fileupload.version>
 		<asm.version>5.1</asm.version>