diff --git a/setup.py b/setup.py
index 997a5bf..8b3c92a 100644
--- a/setup.py
+++ b/setup.py
@@ -48,7 +48,10 @@ requires = [
     # need to explicitly install e.g. 8.0.17 depending on how it behaves...
     'mysql-connector-python',
 
-    'invoke',                           # 1.4.1
+    # TODO: remove this once new version is released
+    # cf. https://github.com/pyinvoke/invoke/issues/935
+    'invoke<2.1',                       # 1.4.1                 2.0.0
+
     'psycopg2',                         # 2.8.4
     'rattail-fabric2',                  # 0.2.1
     'Tailbone',                         # 0.8.72