diff --git a/setup.py b/setup.py
index 975cfaeacbb194d5b32d4ba0837a1e7f31d5e370..41ab965f4be62e0c206defcb6cb795a7b471d2a8 100644
--- a/setup.py
+++ b/setup.py
@@ -41,11 +41,6 @@ requires = [
     #
     # package                           # low                   high
 
-    # TODO: v1.1 suddenly caused an issue; perhaps can remove this
-    # restriction once a later version comes out?
-    # cf. https://docs.pylonsproject.org/projects/plaster/en/latest/changes.html
-    'plaster<1.1',                      # 1.0
-
     'invoke',                           # 0.22.1
     'psycopg2',                         # 2.6.2
     'rattail-tempmon',                  # 0.2.6