diff --git a/.github/workflows/build_test.yml b/.github/workflows/build_test.yml
index 3f82b9a..26c895d 100644
--- a/.github/workflows/build_test.yml
+++ b/.github/workflows/build_test.yml
@@ -10,7 +10,7 @@ jobs:
     timeout-minutes: 10
     strategy:
       matrix:
-        target: ['2.3.2', '2.3.2/alpine']
+        target: ['2.4.0', '2.4.0/alpine']
     steps:
       - name: Checkout
         uses: actions/checkout@v3
diff --git a/.github/workflows/publish_docker_image.yml b/.github/workflows/publish_docker_image.yml
index c31877e..8073ffb 100644
--- a/.github/workflows/publish_docker_image.yml
+++ b/.github/workflows/publish_docker_image.yml
@@ -11,10 +11,10 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          [2.3.2]
+          [2.4.0]
         include:
-          - version: 2.3.2
-            other_tag: '2.3'
+          - version: 2.4.0
+            other_tag: '2.4'
             latest: true
           # - version: 2.0.0
           #   other_tag: '2.0'
diff --git a/2.3.2/Dockerfile b/2.4.0/Dockerfile
similarity index 99%
rename from 2.3.2/Dockerfile
rename to 2.4.0/Dockerfile
index 2c5468d..3106b24 100644
--- a/2.3.2/Dockerfile
+++ b/2.4.0/Dockerfile
@@ -46,7 +46,7 @@ RUN set -eux; \
 	chown redmine:redmine "$HOME"; \
 	chmod 1777 "$HOME"
 
-ENV REDMICA_VERSION 2.3.2
+ENV REDMICA_VERSION 2.4.0
 
 RUN set -eux; \
 	wget -O redmine.tar.gz "https://github.com/redmica/redmica/archive/v${REDMICA_VERSION}.tar.gz"; \
diff --git a/2.3.2/alpine/Dockerfile b/2.4.0/alpine/Dockerfile
similarity index 99%
rename from 2.3.2/alpine/Dockerfile
rename to 2.4.0/alpine/Dockerfile
index 6d3a6d8..4e36514 100644
--- a/2.3.2/alpine/Dockerfile
+++ b/2.4.0/alpine/Dockerfile
@@ -40,7 +40,7 @@ RUN set -eux; \
 	chown redmine:redmine "$HOME"; \
 	chmod 1777 "$HOME"
 
-ENV REDMICA_VERSION 2.3.2
+ENV REDMICA_VERSION 2.4.0
 
 RUN set -eux; \
 	wget -O redmine.tar.gz "https://github.com/redmica/redmica/archive/v${REDMICA_VERSION}.tar.gz"; \
diff --git a/2.3.2/alpine/docker-entrypoint.sh b/2.4.0/alpine/docker-entrypoint.sh
similarity index 100%
rename from 2.3.2/alpine/docker-entrypoint.sh
rename to 2.4.0/alpine/docker-entrypoint.sh
diff --git a/2.3.2/docker-entrypoint.sh b/2.4.0/docker-entrypoint.sh
similarity index 100%
rename from 2.3.2/docker-entrypoint.sh
rename to 2.4.0/docker-entrypoint.sh