diff --git a/setup.py b/setup.py
index b7c677c361..e8d8b82220 100644
--- a/setup.py
+++ b/setup.py
@@ -69,7 +69,7 @@
         'hickle',
         'tabulate',
         'click>=7.0.0',
-        'flask',  # interaction
+        'flask<=2.0.3',  # interaction
         'requests',  # interaction
         'responses',  # interaction
         'URLObject',  # interaction