diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1739161..12aa32f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -46,6 +46,13 @@ Versioning](https://semver.org/spec/v2.0.0.html).
   type instead of `usize` type value for the `cluster_id` field.
 - Updated `insertNode` GraphQL API to no longer require `config` for the
   `agents` parameter.
+- Updated account-related GraphQL APIs to reflect the type change of
+  `Account::max_parallel_sessions` from `Option<u32>` to `Option<u8>`.
+  - The `account` and related queries such as `accountList` now return
+    `maxParallelSessions` as an `Int` within the range of `u8`.
+  - The `insertAccount` and `updateAccount` GraphQL APIs remain unchanged in
+    their interfaces but now only accept parameters related to max parallel
+    sessions within the range of `u8`.
 
 ### Removed
 
diff --git a/Cargo.toml b/Cargo.toml
index 12495c6..d3d6289 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -25,7 +25,7 @@ num-traits = "0.2"
 reqwest = { version = "0.12", default-features = false, features = [
   "rustls-tls-native-roots",
 ] }
-review-database = { git = "https://github.com/petabi/review-database.git", rev = "f59bef0" }
+review-database = { git = "https://github.com/petabi/review-database.git", rev = "3be5e9f" }
 roxy = { git = "https://github.com/aicers/roxy.git", tag = "0.3.0" }
 rustls = { version = "0.23", default-features = false, features = [
   "ring",
diff --git a/src/graphql/account.rs b/src/graphql/account.rs
index a99a495..15b416a 100644
--- a/src/graphql/account.rs
+++ b/src/graphql/account.rs
@@ -7,7 +7,7 @@ use anyhow::anyhow;
 use async_graphql::connection::OpaqueCursor;
 use async_graphql::{
     connection::{Connection, EmptyFields},
-    Context, Enum, InputObject, Object, Result, SimpleObject, StringNumber,
+    Context, Enum, InputObject, Object, Result, SimpleObject,
 };
 use chrono::{DateTime, NaiveDateTime, TimeZone, Utc};
 use review_database::{
@@ -173,7 +173,7 @@ impl AccountMutation {
         language: Option<String>,
         theme: Option<String>,
         allow_access_from: Option<Vec<IpAddress>>,
-        max_parallel_sessions: Option<u32>,
+        max_parallel_sessions: Option<u8>,
     ) -> Result<String> {
         let store = crate::graphql::get_store(ctx).await?;
         let table = store.account_map();
@@ -673,10 +673,10 @@ impl Account {
             .map(|ips| ips.iter().map(ToString::to_string).collect::<Vec<String>>())
     }
 
-    /// The max sessions that can be run in parallel in string within the
-    /// representable range of `u32`.
-    async fn max_parallel_sessions(&self) -> Option<StringNumber<u32>> {
-        self.inner.max_parallel_sessions.map(StringNumber)
+    /// The max sessions that can be run in parallel within the
+    /// representable range of `u8`.
+    async fn max_parallel_sessions(&self) -> Option<u8> {
+        self.inner.max_parallel_sessions
     }
 }
 
@@ -751,11 +751,12 @@ struct UpdateAllowAccessFrom {
     new: Option<Vec<IpAddress>>,
 }
 
-/// The old and new values of `maxParallelSessions` to update.
+/// The old and new values of `maxParallelSessions` to update,
+/// and the values must be in the range of `u8`.
 #[derive(InputObject)]
 struct UpdateMaxParallelSessions {
-    old: Option<u32>,
-    new: Option<u32>,
+    old: Option<u8>,
+    new: Option<u8>,
 }
 
 struct AccountTotalCount;