diff --git a/README.md b/README.md
index 7c5ad8d..6d0ac00 100644
--- a/README.md
+++ b/README.md
@@ -205,8 +205,7 @@ $ ./test.sh mysql-8.0 mysql80-mroonga
 ## How to release
 
 ```shell
-$ ./update.sh ${MYSQL_VERSION} ${MROONGA_VERSION} ${GROONGA_VERSION}
-(./update.sh 8.0.30 12.06 12.0.6)
+$ ./update.sh
 $ git push
 $ git push --tags
 ```
diff --git a/update.sh b/update.sh
index 23b5cb6..fb84ba0 100755
--- a/update.sh
+++ b/update.sh
@@ -2,15 +2,15 @@
 
 set -eu
 
-if [ $# != 3 ]; then
-  echo "Usage: $0 MYSQL_VERSION MROONGA_VERSION GROONGA_VERSION"
-  echo " e.g.: $0 8.0.30 12.06 12.0.6"
-  exit 1
-fi
+target_mysqls=(
+  "8.0"
+  "8.4"
+)
 
-mysql_version=$1
-mroonga_version=$2
-groonga_version=$3
+mroonga_version=$(curl https://api.github.com/repos/mroonga/mroonga/releases/latest \
+                    | jq -r '.["tag_name"]' | sed 's/^v//')
+groonga_version=$(curl https://api.github.com/repos/groonga/groonga/releases/latest \
+                    | jq -r '.["tag_name"]' | sed 's/^v//')
 
 if type gsed > /dev/null 2>&1; then
   SED=gsed
@@ -18,25 +18,28 @@ else
   SED=sed
 fi
 
-case $mysql_version in
-  8.0.*)
-    docker_file=mysql-8.0/Dockerfile
-    ;;
-esac
-
-${SED} \
-  -i'' \
-  -r \
-  -e "s/mysql:[0-9.]*/mysql:${mysql_version}/g" \
-  -e "s/mroonga_version=[0-9.]*/mroonga_version=${mroonga_version}/g" \
-  -e "s/groonga_version=[0-9.]*/groonga_version=${groonga_version}/g" \
-  ${docker_file}
-git add ${docker_file}
-
-ruby "$(dirname "$0")/update-tag-list.rb" "$@"
-git add README.md
-
-tag="mysql-${mysql_version}-${mroonga_version}"
-message="MySQL ${mysql_version} and Mroonga ${mroonga_version}"
-git commit -m "${message}"
-git tag -a -m "${message}" ${tag}
+for target_mysql in "${target_mysqls[@]}"; do
+  docker_file="mysql-${target_mysql}/Dockerfile"
+  mysql_version=$(curl https://raw.githubusercontent.com/docker-library/mysql/refs/heads/master/versions.json \
+                    | jq -r ".[\"${target_mysql}\"][\"version\"]")
+
+  ${SED} \
+    -i'' \
+    -r \
+    -e "s/mysql:[0-9.]*/mysql:${mysql_version}/g" \
+    -e "s/mroonga_version=[0-9.]*/mroonga_version=${mroonga_version}/g" \
+    -e "s/groonga_version=[0-9.]*/groonga_version=${groonga_version}/g" \
+    ${docker_file}
+  git add ${docker_file}
+
+  ruby "$(dirname "$0")/update-tag-list.rb" \
+       "${mysql_version}" \
+       "${mroonga_version}" \
+       "${groonga_version}"
+  git add README.md
+
+  tag="mysql-${mysql_version}-${mroonga_version}"
+  message="MySQL ${mysql_version} and Mroonga ${mroonga_version}"
+  git commit -m "${message}"
+  git tag -a -m "${message}" ${tag}
+done