diff --git a/CHANGELOG.md b/CHANGELOG.md
index c4999e2..5e5a4b3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- chore: add 503 service unavailable response to load endpoints
 
 ## [0.20.0] - 2026-10-15
 
diff --git a/src/apis/connections_api.rs b/src/apis/connections_api.rs
index 9e8d1dd..81daee9 100644
--- a/src/apis/connections_api.rs
+++ b/src/apis/connections_api.rs
@@ -91,6 +91,7 @@ pub enum LoadManagedTableError {
     Status404(models::ApiErrorResponse),
     Status409(models::ApiErrorResponse),
     Status413(models::ApiErrorResponse),
+    Status503(models::ApiErrorResponse),
     UnknownValue(serde_json::Value),
 }
 
diff --git a/src/apis/databases_api.rs b/src/apis/databases_api.rs
index 2641476..958d39d 100644
--- a/src/apis/databases_api.rs
+++ b/src/apis/databases_api.rs
@@ -145,6 +145,7 @@ pub enum LoadDatabaseTableError {
     Status404(models::ApiErrorResponse),
     Status409(models::ApiErrorResponse),
     Status413(models::ApiErrorResponse),
+    Status503(models::ApiErrorResponse),
     UnknownValue(serde_json::Value),
 }