diff --git a/packages/controller-utils/CHANGELOG.md b/packages/controller-utils/CHANGELOG.md
index 4d211062157..fb7c7f36159 100644
--- a/packages/controller-utils/CHANGELOG.md
+++ b/packages/controller-utils/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- Update default Sei Mainnet block explorer URL from `seitrace.com` to
+  `seiscan.io` (`BuiltInNetworkName.SeiMainnet`).
+
 ## [11.20.0]
 
 ### Added
diff --git a/packages/controller-utils/src/types.ts b/packages/controller-utils/src/types.ts
index 42453a22c85..93061e4d768 100644
--- a/packages/controller-utils/src/types.ts
+++ b/packages/controller-utils/src/types.ts
@@ -179,7 +179,7 @@ export const BlockExplorerUrl = {
   [BuiltInNetworkName.BscMainnet]: 'https://bscscan.com',
   [BuiltInNetworkName.OptimismMainnet]: 'https://optimistic.etherscan.io',
   [BuiltInNetworkName.PolygonMainnet]: 'https://polygonscan.com',
-  [BuiltInNetworkName.SeiMainnet]: 'https://seitrace.com',
+  [BuiltInNetworkName.SeiMainnet]: 'https://seiscan.io',
 } as const satisfies Record<BuiltInNetworkType, string>;
 export type BlockExplorerUrl =
   (typeof BlockExplorerUrl)[keyof typeof BlockExplorerUrl];