diff --git a/pom.xml b/pom.xml
index c9df2af..822e44f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>com.worksap.nlp</groupId>
-    <artifactId>analysis-chikkar7.1</artifactId>
+    <artifactId>analysis-chikkar6.7</artifactId>
     <version>1.0.0</version>
     <packaging>jar</packaging>
 
@@ -51,8 +51,8 @@
         <maven.compiler.target>1.8</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <log4j.version>2.9.1</log4j.version>
-        <lucene.version>8.0.0</lucene.version>
-        <elasticsearch.version>7.1.1</elasticsearch.version>
+        <lucene.version>7.7.0</lucene.version>
+        <elasticsearch.version>6.7.2</elasticsearch.version>
         <elasticsearch.plugin.classname>com.worksap.nlp.elasticsearch.plugins.AnalysisChikkarPlugin</elasticsearch.plugin.classname>
         <sudachi.version>0.2.0</sudachi.version>
     </properties>