diff --git a/CHANGELOG.md b/CHANGELOG.md
index fec7743..5d90161 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Web build failure with dio >= 5.8: `DioExceptionType` switch is now
+  exhaustive across dio versions (CI resolves dependencies fresh)
+
 ## [1.7.0] - 2026-07-19
 
 ### Changed
diff --git a/lib/core/api/api_interceptors.dart b/lib/core/api/api_interceptors.dart
index 3fd19d2..30a5673 100644
--- a/lib/core/api/api_interceptors.dart
+++ b/lib/core/api/api_interceptors.dart
@@ -163,7 +163,10 @@ class ErrorInterceptor extends Interceptor {
       case DioExceptionType.badCertificate:
         return const NetworkException(message: 'Invalid SSL certificate');
 
-      case DioExceptionType.unknown:
+      // default keeps this exhaustive across dio versions (CI resolves deps
+      // fresh — pubspec.lock is gitignored — so DioExceptionType can gain
+      // cases, e.g. transformTimeout in dio >= 5.8)
+      default:
         return NetworkException(
           message: err.message ?? 'Unknown error',
           cause: err,