diff --git a/Dockerfile b/Dockerfile
index 8894134..82ceb2a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM node:6.12-alpine
 LABEL maintainer Yuki Takei <yuki@weseek.co.jp>
 
-ENV APP_VERSION v2.3.0
+ENV APP_VERSION v2.3.1
 ENV APP_DIR /opt/crowi-plus
 
 # update tar for '--strip-components' option
diff --git a/README.md b/README.md
index 92af8d4..1d2ca27 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ crowi-plus-docker
 Supported tags and respective Dockerfile links
 ------------------------------------------------
 
-* [`2.3.0`, `2.3`, `2`, `latest` (Dockerfile)](https://github.com/weseek/crowi-plus-docker/blob/v2.3.0/Dockerfile)
+* [`2.3.1`, `2.3`, `2`, `latest` (Dockerfile)](https://github.com/weseek/crowi-plus-docker/blob/v2.3.1/Dockerfile)
 * [`2.2.4`, `2.2` (Dockerfile)](https://github.com/weseek/crowi-plus-docker/blob/v2.2.4/Dockerfile)
 * [`2.1.2`, `2.1` (Dockerfile)](https://github.com/weseek/crowi-plus-docker/blob/v2.1.2/Dockerfile)
 * [`2.0.9`, `2.0` (Dockerfile)](https://github.com/weseek/crowi-plus-docker/blob/v2.0.9/Dockerfile)