diff --git a/quart_session/sessions.py b/quart_session/sessions.py
index bacde5b..17537e9 100644
--- a/quart_session/sessions.py
+++ b/quart_session/sessions.py
@@ -189,7 +189,7 @@ class SessionInterface(QuartSessionInterface):
             session_id = self._get_signer(app).sign(want_bytes(session.sid))
         else:
             session_id = session.sid
-        response.set_cookie(cname, session_id,
+        response.set_cookie(cname, session_id.decode('utf-8'),
                             expires=expires, httponly=httponly,
                             domain=domain, path=path, secure=secure, samesite=samesite)
 
diff --git a/setup.py b/setup.py
index 99fad38..a80f430 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@ INSTALL_REQUIRES = [
 
 setup(
     name='Quart-Session',
-    version='3.0.0',
+    version='3.0.1',
     url='https://github.com/kroketio/quart-session',
     license='BSD',
     author='Kroket Ltd.',