diff --git a/dev/docs/local-installation.md b/dev/docs/local-installation.md
index 154f768037..15c7dad7d4 100644
--- a/dev/docs/local-installation.md
+++ b/dev/docs/local-installation.md
@@ -42,6 +42,8 @@ cargo --version
 
 ### PostgreSQL and PGroonga
 
+Firefish requires PostgreSQL v12 or later. We recommend that you install v12.x for the same reason as Node.js.
+
 PostgreSQL install instructions can be found at [this page](https://www.postgresql.org/download/).
 
 ```sh
diff --git a/docs/install.md b/docs/install.md
index 324923c6a7..0e850e2545 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -1,9 +1,36 @@
 # Install Firefish
 
-This document shows an example procedure for installing Firefish on Debian 12. Note that there is much room for customizing the server setup; this document merely demonstrates a simple installation.
+Firefish depends on the following software.
+
+## Runtime dependencies
+
+- At least [NodeJS](https://nodejs.org/en/) v18.17.0 (v20/v21 recommended)
+- At least [PostgreSQL](https://www.postgresql.org/) v12 (v16 recommended) with [PGroonga](https://pgroonga.github.io/) extension
+- At least [Redis](https://redis.io/) v7
+- Web Proxy (one of the following)
+  - Caddy (recommended)
+  - Nginx (recommended)
+  - Apache
+- [FFmpeg](https://ffmpeg.org/) for video transcoding (**optional**)
+- Caching server (**optional**, one of the following)
+  - [DragonflyDB](https://www.dragonflydb.io/)
+  - [KeyDB](https://keydb.dev/)
+  - Another [Redis](https://redis.io/) server
+
+## Build dependencies
+
+- At least [Rust](https://www.rust-lang.org/) v1.74
+- C/C++ compiler & build tools
+  - `build-essential` on Debian/Ubuntu Linux
+  - `base-devel` on Arch Linux
+- [Python 3](https://www.python.org/)
+
+This document shows an example procedure for installing these dependencies and Firefish on Debian 12. Note that there is much room for customizing the server setup; this document merely demonstrates a simple installation.
 
 If you want to use the pre-built container image, please refer to [`install-container.md`](./install-container.md).
 
+If you do not prepare your environment as document, be sure to meet the minimum dependencies given at the bottom of the page.
+
 Make sure that you can use the `sudo` command before proceeding.
 
 ## 1. Install dependencies