diff --git a/docs/conf.py b/docs/conf.py
index 626afed..2bfa0de 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -308,7 +308,7 @@
 intersphinx_mapping = {
     "python": ("https://docs.python.org/", None),
     "flask": ("https://flask.palletsprojects.com", None),
-    "flask_mail": ("https://pythonhosted.org/Flask-Mail/", None),
+    "flask_mail": ("https://flask-mail.readthedocs.io/en/latest/", None),
 }
 
 # Autodoc configuraton.
diff --git a/setup.cfg b/setup.cfg
index f327f74..d572d5b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -28,7 +28,7 @@ python_requires = >=3.7
 zip_safe = False
 install_requires =
     Flask>=0.11.1
-    Flask-Mail>=0.9.1
+    Flask-Mail>=0.9.1,<0.10.0
 
 [options.extras_require]
 tests =