diff --git a/sentry_sdk/integrations/flask.py b/sentry_sdk/integrations/flask.py
index 49611787f0..86fcd76a16 100644
--- a/sentry_sdk/integrations/flask.py
+++ b/sentry_sdk/integrations/flask.py
@@ -69,8 +69,8 @@ def setup_once():
         except (ValueError, TypeError):
             raise DidNotEnable("Unparsable Flask version: {}".format(FLASK_VERSION))
 
-        if version < (0, 11):
-            raise DidNotEnable("Flask 0.11 or newer is required.")
+        if version < (0, 10):
+            raise DidNotEnable("Flask 0.10 or newer is required.")
 
         request_started.connect(_request_started)
         got_request_exception.connect(_capture_exception)
diff --git a/tox.ini b/tox.ini
index e841b3c9a6..c76954c61c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,8 +25,9 @@ envlist =
     {py3.5,py3.6,py3.7}-django-{2.0,2.1}
     {py3.7,py3.8,py3.9}-django-{2.2,3.0,3.1,dev}
 
-    {pypy,py2.7,py3.5,py3.6,py3.7,py3.8,py3.9}-flask-{1.1,1.0,0.11,0.12}
-    {py3.6,py3.7,py3.8,py3.9}-flask-{1.1,1.0,0.11,0.12,dev}
+    {pypy,py2.7,py3.4,py3.5,py3.6,py3.7,py3.8,py3.9}-flask-{0.10,0.11,0.12,1.0}
+    {pypy,py2.7,py3.5,py3.6,py3.7,py3.8,py3.9}-flask-1.1
+    {py3.6,py3.7,py3.8,py3.9}-flask-dev
 
     {pypy,py2.7,py3.5,py3.6,py3.7,py3.8,py3.9}-bottle-0.12
 
@@ -104,6 +105,7 @@ deps =
     django-dev: git+https://github.com/django/django.git#egg=Django
 
     flask: flask-login
+    flask-0.10: Flask>=0.10,<0.11
     flask-0.11: Flask>=0.11,<0.12
     flask-0.12: Flask>=0.12,<0.13
     flask-1.0: Flask>=1.0,<1.1