diff --git a/CHANGES.md b/CHANGES.md
index 5b31a38..8348aa6 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+## [3.0.0a4] - 2024-07-10
+
+- Update stac-fastapi libraries to `~=3.0.0b2`
+
 ## [3.0.0a3] - 2024-07-01
 
 - Use `quote_plus` instead of `quote` to encode database's password ([#122](https://github.com/stac-utils/stac-fastapi-pgstac/pull/122))
diff --git a/setup.py b/setup.py
index 384ffd1..585737d 100644
--- a/setup.py
+++ b/setup.py
@@ -10,9 +10,9 @@
     "orjson",
     "pydantic",
     "stac_pydantic==3.1.*",
-    "stac-fastapi.api~=3.0.0a4",
-    "stac-fastapi.extensions~=3.0.0a4",
-    "stac-fastapi.types~=3.0.0a4",
+    "stac-fastapi.api~=3.0.0b2",
+    "stac-fastapi.extensions~=3.0.0b2",
+    "stac-fastapi.types~=3.0.0b2",
     "asyncpg",
     "buildpg",
     "brotli_asgi",
diff --git a/stac_fastapi/pgstac/app.py b/stac_fastapi/pgstac/app.py
index 067a244..924ea01 100644
--- a/stac_fastapi/pgstac/app.py
+++ b/stac_fastapi/pgstac/app.py
@@ -9,7 +9,12 @@
 
 from fastapi.responses import ORJSONResponse
 from stac_fastapi.api.app import StacApi
-from stac_fastapi.api.models import create_get_request_model, create_post_request_model
+from stac_fastapi.api.models import (
+    ItemCollectionUri,
+    create_get_request_model,
+    create_post_request_model,
+    create_request_model,
+)
 from stac_fastapi.extensions.core import (
     FieldsExtension,
     FilterExtension,
@@ -49,13 +54,25 @@
 else:
     extensions = list(extensions_map.values())
 
+if any(isinstance(ext, TokenPaginationExtension) for ext in extensions):
+    items_get_request_model = create_request_model(
+        model_name="ItemCollectionUri",
+        base_model=ItemCollectionUri,
+        mixins=[TokenPaginationExtension().GET],
+        request_type="GET",
+    )
+else:
+    items_get_request_model = ItemCollectionUri
+
 post_request_model = create_post_request_model(extensions, base_model=PgstacSearch)
 get_request_model = create_get_request_model(extensions)
+
 api = StacApi(
     settings=settings,
     extensions=extensions,
     client=CoreCrudClient(post_request_model=post_request_model),  # type: ignore
     response_class=ORJSONResponse,
+    items_get_request_model=items_get_request_model,
     search_get_request_model=get_request_model,
     search_post_request_model=post_request_model,
 )
diff --git a/stac_fastapi/pgstac/core.py b/stac_fastapi/pgstac/core.py
index 3bc0dce..63e2182 100644
--- a/stac_fastapi/pgstac/core.py
+++ b/stac_fastapi/pgstac/core.py
@@ -13,6 +13,7 @@
 from pygeofilter.backends.cql2_json import to_cql2
 from pygeofilter.parsers.cql2_text import parse as parse_cql2_text
 from pypgstac.hydration import hydrate
+from stac_fastapi.api.models import JSONResponse
 from stac_fastapi.types.core import AsyncBaseCoreClient
 from stac_fastapi.types.errors import InvalidQueryParameter, NotFoundError
 from stac_fastapi.types.requests import get_base_url
@@ -341,6 +342,14 @@ async def post_search(
             ItemCollection containing items which match the search criteria.
         """
         item_collection = await self._search_base(search_request, request=request)
+
+        # If we have the `fields` extension enabled
+        # we need to avoid Pydantic validation because the
+        # Items might not be a valid STAC Item objects
+        if fields := getattr(search_request, "fields", None):
+            if fields.include or fields.exclude:
+                return JSONResponse(item_collection)  # type: ignore
+
         return ItemCollection(**item_collection)
 
     async def get_search(  # noqa: C901
diff --git a/tests/conftest.py b/tests/conftest.py
index edb916b..6740026 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -16,7 +16,12 @@
 from pypgstac.migrate import Migrate
 from pytest_postgresql.janitor import DatabaseJanitor
 from stac_fastapi.api.app import StacApi
-from stac_fastapi.api.models import create_get_request_model, create_post_request_model
+from stac_fastapi.api.models import (
+    ItemCollectionUri,
+    create_get_request_model,
+    create_post_request_model,
+    create_request_model,
+)
 from stac_fastapi.extensions.core import (
     FieldsExtension,
     FilterExtension,
@@ -86,7 +91,7 @@ async def pgstac(database):
 # Run all the tests that use the api_client in both db hydrate and api hydrate mode
 @pytest.fixture(
     params=[
-        # hydratation, prefix
+        # hydratation, prefix, model_validation
         (False, "", False),
         (False, "/router_prefix", False),
         (True, "", False),
@@ -129,13 +134,23 @@ def api_client(request, database):
         BulkTransactionExtension(client=BulkTransactionsClient()),
     ]
 
-    post_request_model = create_post_request_model(extensions, base_model=PgstacSearch)
+    items_get_request_model = create_request_model(
+        model_name="ItemCollectionUri",
+        base_model=ItemCollectionUri,
+        mixins=[TokenPaginationExtension().GET],
+        request_type="GET",
+    )
+    search_get_request_model = create_get_request_model(extensions)
+    search_post_request_model = create_post_request_model(
+        extensions, base_model=PgstacSearch
+    )
     api = StacApi(
         settings=api_settings,
         extensions=extensions,
-        client=CoreCrudClient(post_request_model=post_request_model),
-        search_get_request_model=create_get_request_model(extensions),
-        search_post_request_model=post_request_model,
+        client=CoreCrudClient(post_request_model=search_post_request_model),
+        items_get_request_model=items_get_request_model,
+        search_get_request_model=search_get_request_model,
+        search_post_request_model=search_post_request_model,
         response_class=ORJSONResponse,
         router=APIRouter(prefix=prefix),
     )