diff --git a/Pipfile b/Pipfile
index 235bcc3..e1b8e5e 100644
--- a/Pipfile
+++ b/Pipfile
@@ -6,7 +6,6 @@ name = "pypi"
 [packages]
 responder = {editable = true, path = "."}
 
-
 [dev-packages]
 pytest = "*"
 "flake8" = "*"
diff --git a/Pipfile.lock b/Pipfile.lock
index 85086c1..92f6691 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -37,6 +37,20 @@
             ],
             "version": "==1.0.0b3"
         },
+        "asgiref": {
+            "hashes": [
+                "sha256:9b05dcd41a6a89ca8c6e7f7e4089c3f3e76b5af60aebb81ae6d455ad81989c97",
+                "sha256:b21dc4c43d7aba5a844f4c48b8f49d56277bc34937fd9f9cb93ec97fde7e3082"
+            ],
+            "version": "==2.3.2"
+        },
+        "async-timeout": {
+            "hashes": [
+                "sha256:0c3c816a028d47f659d6ff5c745cb2acf1f966da1fe5c19c77a70282b25f4c5f",
+                "sha256:4291ca197d287d274d0b6cb5d6f8f8f82d434ed288f962539ff18cc9012f9ea3"
+            ],
+            "version": "==3.0.1"
+        },
         "certifi": {
             "hashes": [
                 "sha256:339dc09518b07e2fa7eda5450740925974815557727d6bd35d319c1524a04a4c",
diff --git a/responder/api.py b/responder/api.py
index 649033f..4ec94d3 100644
--- a/responder/api.py
+++ b/responder/api.py
@@ -14,6 +14,7 @@ from starlette.testclient import TestClient
 from apispec import APISpec
 from apispec.ext.marshmallow import MarshmallowPlugin
 from apispec import yaml_utils
+from asgiref.wsgi import WsgiToAsgi
 
 from . import models
 from . import status_codes
@@ -104,7 +105,11 @@ class API:
             if path.startswith(path_prefix):
                 scope["path"] = path[len(path_prefix) :]
                 scope["root_path"] = root_path + path_prefix
-                return app(scope)
+                try:
+                    return app(scope)
+                except TypeError:
+                    app = WsgiToAsgi(app)
+                    return app(scope)
 
         # Call the main dispatcher.
         async def asgi(receive, send):
@@ -299,13 +304,13 @@ class API:
 
         return decorator
 
-    def mount(self, route, asgi_app):
-        """Mounts an ASGI application at a given route.
+    def mount(self, route, app):
+        """Mounts an WSGI / ASGI application at a given route.
 
         :param route: String representation of the route to be used (shouldn't be parameterized).
-        :param asgi_app: The other ASGI app.
+        :param app: The other WSGI / ASGI app.
         """
-        self.apps.update({route: asgi_app})
+        self.apps.update({route: app})
 
     def session(self, base_url="http://;"):
         """Testing HTTP client. Returns a Requests session object, able to send HTTP requests to the Responder application.
diff --git a/setup.py b/setup.py
index bb779c2..a7d201e 100644
--- a/setup.py
+++ b/setup.py
@@ -37,6 +37,7 @@ required = [
     "chardet",
     "apispec>=1.0.0b1",
     "marshmallow",
+    "asgiref",
 ]
 
 
diff --git a/tests/test_responder.py b/tests/test_responder.py
index f38fb8c..01d92f2 100644
--- a/tests/test_responder.py
+++ b/tests/test_responder.py
@@ -323,7 +323,6 @@ def test_schema_generation():
     assert dump["openapi"] == "3.0"
 
 
-@pytest.mark.xfail
 def test_mount_wsgi_app(api, flask, session):
     @api.route("/")
     def hello(req, resp):