diff --git a/Dockerfile b/Dockerfile
index c58b9099..46aa1138 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # Golang version defined in https://github.com/kaishuu0123/erd-go/blob/${ERD_VERSION}/go.mod#L3
 ARG ERD_GOLANG_BUILDER_TAG=1.15-alpine
 ARG A2S_GOLANG_BUILDER_TAG=1.20-alpine3.18
-ARG alpine_version=3.18.2
+ARG alpine_version=3.18.3
 FROM alpine:${alpine_version} AS base
 
 # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
diff --git a/README.adoc b/README.adoc
index 3281d8ab..ffa6ef89 100644
--- a/README.adoc
+++ b/README.adoc
@@ -1,4 +1,4 @@
-:ALPINE_VERSION: 3.18.2
+:ALPINE_VERSION: 3.18.3
 :ASCIIDOCTOR_VERSION: 2.0.20
 :ASCIIDOCTOR_CONFLUENCE_VERSION: 0.0.2
 :ASCIIDOCTOR_PDF_VERSION: 2.3.9
diff --git a/README.md b/README.md
index 24c67b79..e4a35b7a 100644
--- a/README.md
+++ b/README.md
@@ -6,9 +6,9 @@ This Docker image provides:
 
 -   [Asciidoctor](https://asciidoctor.org/) 2.0.20
 
--   [Asciidoctor Diagram](https://asciidoctor.org/docs/asciidoctor-diagram/) 2.2.9 with ERD and Graphviz integration (supports plantuml and graphiz diagrams)
+-   [Asciidoctor Diagram](https://asciidoctor.org/docs/asciidoctor-diagram/) 2.2.10 with ERD and Graphviz integration (supports plantuml and graphiz diagrams)
 
--   [Asciidoctor PDF](https://asciidoctor.org/docs/asciidoctor-pdf/) 2.3.8
+-   [Asciidoctor PDF](https://asciidoctor.org/docs/asciidoctor-pdf/) 2.3.9
 
 -   [Asciidoctor EPUB3](https://asciidoctor.org/docs/asciidoctor-epub3/) 1.5.1
 
@@ -16,7 +16,7 @@ This Docker image provides:
 
 -   [Asciidoctor Mathematical](https://github.com/asciidoctor/asciidoctor-mathematical) 0.3.5
 
--   [Asciidoctor reveal.js](https://docs.asciidoctor.org/reveal.js-converter/latest/) 4.1.0
+-   [Asciidoctor reveal.js](https://docs.asciidoctor.org/reveal.js-converter/latest/) 5.0.1
 
 -   [AsciiMath](https://rubygems.org/gems/asciimath)
 
@@ -30,7 +30,7 @@ This Docker image provides:
 
 -   [Asciidoctor Reducer](https://github.com/asciidoctor/asciidoctor-reducer) 1.0.2
 
-This image uses Alpine Linux 3.18.2 as base image.
+This image uses Alpine Linux 3.18.3 as base image.
 
 <div class="note">
 
diff --git a/tests/asciidoctor.bats b/tests/asciidoctor.bats
index ea8edf48..615e9239 100644
--- a/tests/asciidoctor.bats
+++ b/tests/asciidoctor.bats
@@ -1,7 +1,7 @@
 #!/usr/bin/env bats
 
 TMP_GENERATION_DIR="${BATS_TEST_DIRNAME}/tmp"
-ALPINE_VERSION=3.18.2
+ALPINE_VERSION=3.18.3
 ASCIIDOCTOR_VERSION=2.0.20
 ASCIIDOCTOR_CONFLUENCE_VERSION=0.0.2
 ASCIIDOCTOR_PDF_VERSION=2.3.9