diff --git a/metadata_backend/api/auth.py b/metadata_backend/api/auth.py
index 0777b2ef7..d8e916348 100644
--- a/metadata_backend/api/auth.py
+++ b/metadata_backend/api/auth.py
@@ -4,7 +4,7 @@
 from typing import Any, Optional
 
 import aiohttp_session
-from aiohttp import web
+from aiohttp import ClientTimeout, web
 from aiohttp.client_exceptions import ClientConnectorError, InvalidURL
 from aiohttp.web import Request, Response
 from idpyoidc.client.rp_handler import RPHandler
@@ -340,7 +340,7 @@ async def _healtcheck(self) -> dict[str, str]:
             async with self._client.request(
                 method="GET",
                 url=f"{self.base_url}/.well-known/openid-configuration",
-                timeout=10,
+                timeout=ClientTimeout(total=10),
             ) as response:
                 content = await response.json()
                 LOG.debug("AAI REST API response content is: %r.", content)
diff --git a/metadata_backend/server.py b/metadata_backend/server.py
index d92d7b39c..5b9349675 100644
--- a/metadata_backend/server.py
+++ b/metadata_backend/server.py
@@ -51,13 +51,13 @@ async def init(
     middlewares = [http_error_handler, check_session]
     if inject_middleware:
         middlewares = middlewares + inject_middleware
-    api = web.Application(middlewares=middlewares)
+    api = web.Application(middlewares=middlewares)  # type: ignore
 
     sec_key = base64.urlsafe_b64decode(Fernet.generate_key())
     session_middleware = aiohttp_session.session_middleware(
         aiohttp_session.cookie_storage.EncryptedCookieStorage(sec_key)
     )
-    server = web.Application(middlewares=[session_middleware])
+    server = web.Application(middlewares=[session_middleware])  # type: ignore
 
     metax_handler = MetaxServiceHandler()
     datacite_handler = DataciteServiceHandler()
diff --git a/metadata_backend/services/datacite_service_handler.py b/metadata_backend/services/datacite_service_handler.py
index 7c148303b..e911bd339 100644
--- a/metadata_backend/services/datacite_service_handler.py
+++ b/metadata_backend/services/datacite_service_handler.py
@@ -140,7 +140,7 @@ async def _healtcheck(self) -> dict[str, Any]:
             async with self._client.request(
                 method="GET",
                 url=f"{self.base_url}/heartbeat",
-                timeout=10,
+                timeout=ClientTimeout(total=10),
             ) as response:
                 content = await response.text()
                 LOG.info("Datacite REST API response content is: %s.", content)
diff --git a/metadata_backend/services/metax_service_handler.py b/metadata_backend/services/metax_service_handler.py
index f8e4a0b51..f4345d498 100644
--- a/metadata_backend/services/metax_service_handler.py
+++ b/metadata_backend/services/metax_service_handler.py
@@ -7,7 +7,7 @@
 import time
 from typing import Any
 
-from aiohttp import BasicAuth, web
+from aiohttp import BasicAuth, ClientTimeout, web
 from aiohttp.client_exceptions import ClientConnectorError, InvalidURL
 from yarl import URL
 
@@ -316,7 +316,7 @@ async def _healtcheck(self) -> dict[str, str]:
             async with self._client.request(
                 method="GET",
                 url=f"{URL(metax_config['url'])}/watchman/ping/",
-                timeout=10,
+                timeout=ClientTimeout(total=10),
             ) as response:
                 LOG.debug("Metax REST API status is: %s.", response.status)
                 content = await response.text()
diff --git a/metadata_backend/services/rems_service_handler.py b/metadata_backend/services/rems_service_handler.py
index 4c248766b..c1896fb0e 100644
--- a/metadata_backend/services/rems_service_handler.py
+++ b/metadata_backend/services/rems_service_handler.py
@@ -15,7 +15,7 @@
 import time
 from typing import Any
 
-from aiohttp import web
+from aiohttp import ClientTimeout, web
 from aiohttp.client_exceptions import ClientConnectorError, InvalidURL
 from yarl import URL
 
@@ -181,7 +181,7 @@ async def _healtcheck(self) -> dict[str, Any]:
             async with self._client.request(
                 method="GET",
                 url=f"{self.base_url}/health",
-                timeout=10,
+                timeout=ClientTimeout(total=10),
             ) as response:
                 LOG.debug("REMS REST API status is: %s.", response.status)
                 content = await response.json()
diff --git a/metadata_backend/services/service_handler.py b/metadata_backend/services/service_handler.py
index 1ba3dd29e..7b5d3a552 100644
--- a/metadata_backend/services/service_handler.py
+++ b/metadata_backend/services/service_handler.py
@@ -140,7 +140,7 @@ async def _request(
                 url=url,
                 params=params,
                 json=json_data,
-                timeout=timeout,
+                timeout=ClientTimeout(total=timeout),
             ) as response:
                 if not response.ok:
                     content = await response.text()
diff --git a/requirements-dev.txt b/requirements-dev.txt
index c3dbe0c50..fe265e437 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -6,7 +6,7 @@
 #
 aiofiles==24.1.0
     # via -r requirements-dev.in
-aiohttp==3.9.5
+aiohttp==3.10.5
     # via
     #   -r requirements.txt
     #   aiohttp-session
diff --git a/requirements.txt b/requirements.txt
index dea69b7ee..bf1d9f225 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@
 #
 #    pip-compile requirements.in
 #
-aiohttp==3.9.5
+aiohttp==3.10.5
     # via
     #   -r requirements.in
     #   aiohttp-session