diff --git a/README.md b/README.md
index 08c19ef..73609b2 100644
--- a/README.md
+++ b/README.md
@@ -8,8 +8,8 @@ Those images based on [postgres](https://hub.docker.com/_/postgres) and could us
 
 | PGroonga | PostgreSQL | Distribution              | Tags                                        | Path                                              |
 | -------- | ---------- | ------------------------- | ------------------------------------------- | ------------------------------------------------- |
-| 4.0.4    | 18         | Alpine Linux              | 4.0.4-alpine-18, latest-alpine-18           | [alpine/18/Dockerfile][4.0.4-alpine-18]           |
-| 4.0.4    | 17         | Alpine Linux              | 4.0.4-alpine-17, latest-alpine-17, latest   | [alpine/17/Dockerfile][4.0.4-alpine-17]           |
+| 4.0.4    | 18         | Alpine Linux              | 4.0.4-alpine-18, latest-alpine-18, latest   | [alpine/18/Dockerfile][4.0.4-alpine-18]           |
+| 4.0.4    | 17         | Alpine Linux              | 4.0.4-alpine-17, latest-alpine-17           | [alpine/17/Dockerfile][4.0.4-alpine-17]           |
 | 4.0.4    | 16         | Alpine Linux              | 4.0.4-alpine-16, latest-alpine-16           | [alpine/16/Dockerfile][4.0.4-alpine-16]           |
 | 4.0.4    | 15         | Alpine Linux              | 4.0.4-alpine-15, latest-alpine-15           | [alpine/15/Dockerfile][4.0.4-alpine-15]           |
 | 4.0.4    | 14         | Alpine Linux              | 4.0.4-alpine-14, latest-alpine-14           | [alpine/14/Dockerfile][4.0.4-alpine-14]           |
diff --git a/update-tag-list.rb b/update-tag-list.rb
index 84793ff..effb9b0 100755
--- a/update-tag-list.rb
+++ b/update-tag-list.rb
@@ -12,11 +12,11 @@ def debian_code_name(type_path)
 end
 
 type_paths = []
-alpine_type_paths = Dir.glob("alpine/*") - ["alpine/build.sh"]
-alpine_slim_type_paths = Dir.glob("alpine/*-slim")
+alpine_type_paths = (Dir.glob("alpine/*") - ["alpine/build.sh"]).sort.reverse
+alpine_slim_type_paths = Dir.glob("alpine/*-slim").sort.reverse
 alpine_type_paths -= alpine_slim_type_paths
-type_paths += alpine_type_paths.sort.reverse
-type_paths += alpine_slim_type_paths.sort.reverse
+type_paths += alpine_type_paths
+type_paths += alpine_slim_type_paths
 type_paths += Dir.glob("debian/*").sort.reverse
 
 readme_md_path = File.join(__dir__, "README.md")
@@ -29,7 +29,8 @@ def debian_code_name(type_path)
     when / latest /
       components = line.split("|")
 
-      latest_postgresql_version = components[2].strip
+      # "alpine/18" -> "18"
+      latest_postgresql_version = alpine_type_paths[0].split("/")[1]
 
       pgroonga_version_width = components[1].size - 2
       postgresql_version_width = components[2].size - 2