diff --git a/package.json b/package.json
index df4968fd6..b324c02ff 100644
--- a/package.json
+++ b/package.json
@@ -75,7 +75,7 @@
     "@substrate/dev": "^0.9.0",
     "@types/argparse": "2.0.17",
     "@types/express": "^5.0.5",
-    "@types/express-serve-static-core": "^5.0.6",
+    "@types/express-serve-static-core": "^5.1.1",
     "@types/http-errors": "2.0.5",
     "@types/lru-cache": "^7.10.10",
     "@types/morgan": "1.9.10",
diff --git a/src/controllers/blocks/BlocksExtrinsicsController.ts b/src/controllers/blocks/BlocksExtrinsicsController.ts
index b9112df60..e14874b32 100644
--- a/src/controllers/blocks/BlocksExtrinsicsController.ts
+++ b/src/controllers/blocks/BlocksExtrinsicsController.ts
@@ -97,7 +97,7 @@ export default class BlocksExtrinsicsController extends AbstractController<Block
 				/**
 				 * Verify our param `extrinsicIndex` is an integer represented as a string
 				 */
-				this.parseNumberOrThrow(extrinsicIndex, '`exstrinsicIndex` path param is not a number');
+				this.parseNumberOrThrow(extrinsicIndex, '`extrinsicIndex` path param is not a number');
 
 				/**
 				 * Change extrinsicIndex from a type string to a number before passing it
@@ -153,7 +153,7 @@ export default class BlocksExtrinsicsController extends AbstractController<Block
 			/**
 			 * Verify our param `extrinsicIndex` is an integer represented as a string
 			 */
-			this.parseNumberOrThrow(extrinsicIndex, '`exstrinsicIndex` path param is not a number');
+			this.parseNumberOrThrow(extrinsicIndex, '`extrinsicIndex` path param is not a number');
 
 			/**
 			 * Change extrinsicIndex from a type string to a number before passing it
diff --git a/src/controllers/blocks/BlocksTraceController.ts b/src/controllers/blocks/BlocksTraceController.ts
index fde54c793..ea0ecd873 100644
--- a/src/controllers/blocks/BlocksTraceController.ts
+++ b/src/controllers/blocks/BlocksTraceController.ts
@@ -14,10 +14,11 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import { RequestHandler } from 'express-serve-static-core';
+import { RequestHandler } from 'express';
 
 import { validateBoolean } from '../../middleware';
 import { BlocksTraceService } from '../../services';
+import type { INumberParam } from '../../types/requests';
 import AbstractController from '../AbstractController';
 import BlocksController from './BlocksController';
 
@@ -39,19 +40,22 @@ export default class BlocksTraceController extends AbstractController<BlocksTrac
 		]);
 	}
 
-	private getLatestBlockTraces: RequestHandler = async (_req, res): Promise<void> => {
+	private getLatestBlockTraces: RequestHandler<INumberParam> = async (_req, res): Promise<void> => {
 		const hash = await this.api.rpc.chain.getFinalizedHead();
 
 		BlocksController.sanitizedSend(res, await this.service.traces(hash));
 	};
 
-	private getBlockTraces: RequestHandler = async ({ params: { number } }, res): Promise<void> => {
+	private getBlockTraces: RequestHandler<INumberParam> = async ({ params: { number } }, res): Promise<void> => {
 		const hash = await this.getHashForBlock(number);
 
 		BlocksController.sanitizedSend(res, await this.service.traces(hash));
 	};
 
-	private getLatestBlockOperations: RequestHandler = async ({ query: { actions } }, res): Promise<void> => {
+	private getLatestBlockOperations: RequestHandler<INumberParam> = async (
+		{ query: { actions } },
+		res,
+	): Promise<void> => {
 		const hash = await this.api.rpc.chain.getFinalizedHead();
 		const includeActions = actions === 'true';
 		const historicApi = await this.api.at(hash);
@@ -59,7 +63,7 @@ export default class BlocksTraceController extends AbstractController<BlocksTrac
 		BlocksController.sanitizedSend(res, await this.service.operations(hash, historicApi, includeActions));
 	};
 
-	private getBlockOperations: RequestHandler = async (
+	private getBlockOperations: RequestHandler<INumberParam> = async (
 		{ params: { number }, query: { actions } },
 		res,
 	): Promise<void> => {
diff --git a/src/services/blocks/BlocksService.spec.ts b/src/services/blocks/BlocksService.spec.ts
index 38476e3af..3d071662c 100644
--- a/src/services/blocks/BlocksService.spec.ts
+++ b/src/services/blocks/BlocksService.spec.ts
@@ -405,8 +405,8 @@ describe('BlocksService', () => {
 
 		it('Throw an error when param `extrinsicIndex` is less than 0', () => {
 			expect(() => {
-				parseNumberOrThrow('-5', '`exstrinsicIndex` path param is not a number');
-			}).toThrow(new BadRequest('`exstrinsicIndex` path param is not a number'));
+				parseNumberOrThrow('-5', '`extrinsicIndex` path param is not a number');
+			}).toThrow(new BadRequest('`extrinsicIndex` path param is not a number'));
 		});
 	});
 
diff --git a/yarn.lock b/yarn.lock
index d650f6803..259765257 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2476,7 +2476,7 @@ __metadata:
     "@substrate/dev": "npm:^0.9.0"
     "@types/argparse": "npm:2.0.17"
     "@types/express": "npm:^5.0.5"
-    "@types/express-serve-static-core": "npm:^5.0.6"
+    "@types/express-serve-static-core": "npm:^5.1.1"
     "@types/http-errors": "npm:2.0.5"
     "@types/lru-cache": "npm:^7.10.10"
     "@types/morgan": "npm:1.9.10"
@@ -2708,7 +2708,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/express-serve-static-core@npm:^5.0.0, @types/express-serve-static-core@npm:^5.0.6":
+"@types/express-serve-static-core@npm:^5.0.0":
   version: 5.0.6
   resolution: "@types/express-serve-static-core@npm:5.0.6"
   dependencies:
@@ -2720,6 +2720,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/express-serve-static-core@npm:^5.1.1":
+  version: 5.1.1
+  resolution: "@types/express-serve-static-core@npm:5.1.1"
+  dependencies:
+    "@types/node": "npm:*"
+    "@types/qs": "npm:*"
+    "@types/range-parser": "npm:*"
+    "@types/send": "npm:*"
+  checksum: 10/7f3d8cf7e68764c9f3e8f6a12825b69ccf5287347fc1c20b29803d4f08a4abc1153ae11d7258852c61aad50f62ef72d4c1b9c97092b0a90462c3dddec2f6026c
+  languageName: node
+  linkType: hard
+
 "@types/express@npm:^5.0.5":
   version: 5.0.5
   resolution: "@types/express@npm:5.0.5"