diff --git a/setup.cfg b/setup.cfg
index f8a7875..df6742c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -27,7 +27,7 @@ license_files = LICENSE
 platforms = unix, linux, osx, win32
 classifiers =
     Operating System :: OS Independent
-    Development Status :: 4 - Beta
+    Development Status :: 5 - Production/Stable
     Framework :: FastAPI
     Programming Language :: Python
     Programming Language :: Python :: 3
diff --git a/src/fastapi_oauth2/__init__.py b/src/fastapi_oauth2/__init__.py
index 81a2814..5becc17 100644
--- a/src/fastapi_oauth2/__init__.py
+++ b/src/fastapi_oauth2/__init__.py
@@ -1 +1 @@
-__version__ = "1.0.0-beta.3"
+__version__ = "1.0.0"
diff --git a/src/fastapi_oauth2/core.py b/src/fastapi_oauth2/core.py
index 1eb6c59..76486e2 100644
--- a/src/fastapi_oauth2/core.py
+++ b/src/fastapi_oauth2/core.py
@@ -54,6 +54,7 @@ class OAuth2Core:
     _oauth_client: Optional[WebApplicationClient] = None
     _authorization_endpoint: str = None
     _token_endpoint: str = None
+    _access_token: str = None
     _state: str = None
 
     def __init__(self, client: OAuth2Client) -> None:
@@ -70,7 +71,9 @@ def __init__(self, client: OAuth2Client) -> None:
 
     @property
     def access_token(self) -> str:
-        return self._oauth_client.access_token
+        if not self._access_token:
+            self._access_token = self._oauth_client.access_token
+        return self._access_token
 
     def get_redirect_uri(self, request: Request) -> str:
         return urljoin(str(request.base_url), "/oauth2/%s/token" % self.provider)
diff --git a/tests/conftest.py b/tests/conftest.py
index 26fc29b..5766231 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -78,6 +78,10 @@ def auth(request: Request):
             )
             return response
 
+        @app_router.get("/access-token")
+        def access_token(request: Request):
+            return Response(request.auth.provider.access_token)
+
         if with_idp:
             @app_router.get("/oauth2/{provider}/token")
             async def token(request: Request, provider: str):
diff --git a/tests/test_oauth2.py b/tests/test_oauth2.py
index a9f9d2c..6d10669 100644
--- a/tests/test_oauth2.py
+++ b/tests/test_oauth2.py
@@ -62,3 +62,21 @@ async def test_oauth2_csrf_workflow(get_app):
             await oauth2_workflow(get_app, idp=True, ssr=False, authorize_query=aq, token_query=tq, use_header=True)
         except AssertionError:
             assert aq != tq
+
+
+@pytest.mark.anyio
+async def test_core_access_token(get_app):
+    async with AsyncClient(app=get_app(with_idp=True, with_ssr=True), base_url="http://test") as client:
+        response = await client.get("/oauth2/test/authorize")
+        authorization_endpoint = response.headers.get("location")
+        response = await client.get(authorization_endpoint)
+        token_url = response.headers.get("location")
+        query = {k: v[0] for k, v in parse_qs(urlparse(token_url).query).items()}
+        token_url = "%s?%s" % (token_url.split("?")[0], urlencode(query))
+        await client.get(token_url)
+
+        response = await client.get("/access-token")
+        assert response.content != b""
+
+        response = await client.get("/access-token")
+        assert response.content != b""