diff --git a/Cargo.lock b/Cargo.lock
index cfe07ae..b5fc15b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -420,6 +420,26 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "enum-iterator"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c280b9e6b3ae19e152d8e31cf47f18389781e119d4013a2a2bb0180e5facc635"
+dependencies = [
+ "enum-iterator-derive",
+]
+
+[[package]]
+name = "enum-iterator-derive"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1ab991c1362ac86c61ab6f556cff143daa22e5a15e4e189df818b2fd19fe65b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.66",
+]
+
 [[package]]
 name = "equivalent"
 version = "1.0.1"
@@ -466,7 +486,9 @@ dependencies = [
  "chrono",
  "clap",
  "color-print",
+ "enum-iterator",
  "serde",
+ "serde_repr",
  "sqlx",
  "thiserror",
  "tokio",
@@ -1218,6 +1240,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_repr"
+version = "0.1.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c64451ba24fc7a6a2d60fc75dd9c83c90903b19028d4eff35e88fc1e86564e9"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.66",
+]
+
 [[package]]
 name = "serde_spanned"
 version = "0.6.6"
diff --git a/Cargo.toml b/Cargo.toml
index 58d5f9f..87e922b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,8 +13,10 @@ path = "src/main.rs"
 chrono = "0.4"
 clap = { version = "4.5", features = ["derive"] }
 color-print = "0.3"
+enum-iterator = "2.1"
 thiserror = "1.0"
 serde = { version = "1.0", features = ["derive"] }
+serde_repr = "0.1"
 sqlx = { version = "0.7", features = ["runtime-tokio", "postgres"] }
 tokio = { version = "1.38", features = ["full"] }
 toml = "0.8"
diff --git a/src/command/config.rs b/src/command/config.rs
index 0c9974a..36f9088 100644
--- a/src/command/config.rs
+++ b/src/command/config.rs
@@ -35,7 +35,7 @@ pub(crate) enum RevisionCheckError {
     ReadFile(#[from] std::io::Error),
 }
 
-fn next_revision() -> Result<Option<Revision>, RevisionCheckError> {
+fn current_revision() -> Result<Revision, RevisionCheckError> {
     let old_config_exists = Path::new(OLD_CONFIG_PATH).is_file();
     let server_config_exists = Path::new(SERVER_CONFIG_PATH).is_file();
     let client_config_exists = Path::new(CLIENT_CONFIG_PATH).is_file();
@@ -57,7 +57,7 @@ fn next_revision() -> Result<Option<Revision>, RevisionCheckError> {
     }
 
     if old_config_exists && !server_config_exists && !client_config_exists {
-        return Ok(Some(Revision::V1));
+        return Ok(Revision::V0);
     }
 
     #[derive(Deserialize)]
@@ -83,11 +83,7 @@ fn next_revision() -> Result<Option<Revision>, RevisionCheckError> {
         ));
     }
 
-    let next_revision = match server_config_revision {
-        Revision::V1 => None,
-    };
-
-    Ok(next_revision)
+    Ok(server_config_revision)
 }
 
 pub(crate) async fn run(command: Commands) -> Result<(), ConfigError> {
diff --git a/src/command/config/update.rs b/src/command/config/update.rs
index 802d65e..2a08f3c 100644
--- a/src/command/config/update.rs
+++ b/src/command/config/update.rs
@@ -3,11 +3,12 @@
 mod v1;
 
 use crate::{
-    command::config::{next_revision, RevisionCheckError},
+    command::config::{current_revision, RevisionCheckError},
     config::{Revision, CLIENT_CONFIG_PATH, SERVER_CONFIG_PATH},
 };
 use chrono::Local;
 use color_print::cprintln;
+use enum_iterator::Sequence;
 use std::{fs, io};
 
 /// Errors that happen in `config update` subcommand
@@ -41,34 +42,36 @@ fn take_backup() -> Result<(), UpdateError> {
     Ok(())
 }
 
-async fn update_to_latest() -> Result<(), UpdateError> {
-    while let Some(next_revision) = next_revision()? {
-        run_impl(next_revision).await?;
+async fn update_to_latest(mut revision: Revision) -> Result<(), UpdateError> {
+    while let Some(next_revision) = revision.next() {
+        run_impl(&next_revision).await?;
+        revision = next_revision.clone();
     }
     Ok(())
 }
 
 /// Updates config files to the specified revision.
-async fn run_impl(revision: Revision) -> Result<(), UpdateError> {
+async fn run_impl(revision: &Revision) -> Result<(), UpdateError> {
     match revision {
+        Revision::V0 => unreachable!(),
         Revision::V1 => v1::run().await?,
     }
     Ok(())
 }
 
 pub(super) async fn run(revision: Option<Revision>) -> Result<(), UpdateError> {
-    let next_revision = next_revision()?;
+    let current_revision = current_revision()?;
 
-    if next_revision.is_none() {
+    if current_revision == Revision::last().unwrap() {
         println!("Your config files are already up-to-date! (as of this fishctl release)");
         return Ok(());
     }
-    if next_revision.unwrap() != Revision::V1 {
+    if current_revision != Revision::V0 {
         take_backup()?;
     }
 
     match revision {
-        Some(revision) => run_impl(revision).await,
-        None => update_to_latest().await,
+        Some(revision) => run_impl(&revision).await,
+        None => update_to_latest(current_revision).await,
     }
 }
diff --git a/src/command/config/validate.rs b/src/command/config/validate.rs
index 5336bec..e6dd20a 100644
--- a/src/command/config/validate.rs
+++ b/src/command/config/validate.rs
@@ -1,10 +1,11 @@
 //! `config validate` subcommand
 
 use crate::{
-    command::config::{next_revision, RevisionCheckError},
-    config::{client, server, CLIENT_CONFIG_PATH, SERVER_CONFIG_PATH},
+    command::config::{current_revision, RevisionCheckError},
+    config::{client, server, Revision, CLIENT_CONFIG_PATH, SERVER_CONFIG_PATH},
 };
 use color_print::cprintln;
+use enum_iterator::Sequence;
 use std::{fs, io::Read};
 use validator::Validate;
 
@@ -30,7 +31,7 @@ enum ReadError {
 }
 
 pub(super) fn run() -> Result<(), ValidationError> {
-    if next_revision()?.is_some() {
+    if current_revision()? != Revision::last().unwrap() {
         cprintln!("Please first run `<bold>fishctl config update</>` to update your config files.");
         return Err(ValidationError::OutOfDate);
     }
diff --git a/src/config/mod.rs b/src/config/mod.rs
index 5fd590c..6debd2d 100644
--- a/src/config/mod.rs
+++ b/src/config/mod.rs
@@ -2,15 +2,20 @@ pub mod client;
 pub mod server;
 
 use clap::ValueEnum;
-use serde::{Deserialize, Serialize};
-
-#[derive(Deserialize, Serialize, PartialEq, Clone, ValueEnum, Debug)]
-#[clap(rename_all = "lowercase")]
-pub enum Revision {
-    #[serde(rename = "1")]
-    V1,
-}
+use enum_iterator::Sequence;
+use serde_repr::{Deserialize_repr, Serialize_repr};
 
 pub const SERVER_CONFIG_PATH: &str = "config/server.toml";
 pub const CLIENT_CONFIG_PATH: &str = "config/client.toml";
 pub const OLD_CONFIG_PATH: &str = ".config/default.yml";
+
+#[derive(Deserialize_repr, Serialize_repr, PartialEq, Clone, ValueEnum, Sequence, Debug)]
+#[clap(rename_all = "lowercase")]
+#[repr(u8)]
+pub enum Revision {
+    #[clap(skip)]
+    /// Misskey-style config (`.config/default.yml`)
+    V0 = 0,
+    /// The first revision number for `config/{server,client}.toml`
+    V1,
+}