diff --git a/Dockerfile b/Dockerfile
index 4a5b7ef..fa17034 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,3 @@
-FROM docker.elastic.co/elasticsearch/elasticsearch:6.3.1
+FROM docker.elastic.co/elasticsearch/elasticsearch:6.4.1
 RUN cd /usr/share/elasticsearch/ && bin/elasticsearch-plugin install analysis-kuromoji
 RUN cd /usr/share/elasticsearch/ && bin/elasticsearch-plugin install analysis-smartcn