diff --git a/setup.py b/setup.py
index 41ab965f4be62e0c206defcb6cb795a7b471d2a8..22a91605bb0d1579eba53e0f8dc90b013e43b2e3 100644
--- a/setup.py
+++ b/setup.py
@@ -41,7 +41,10 @@ requires = [
     #
     # package                           # low                   high
 
-    'invoke',                           # 0.22.1
+    # TODO: remove this workaround after new version is released?
+    # cf. https://github.com/pyinvoke/invoke/issues/935
+    'invoke!=2.1.0',                    # 0.22.1                2.0.0
+
     'psycopg2',                         # 2.6.2
     'rattail-tempmon',                  # 0.2.6
     'Tailbone',                         # 0.5.49