diff --git a/setup.py b/setup.py
index 2deb7c98578..130327ff8f1 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@
 # TODO: if py gets upgrade to >=1.6,
 #       remove _width_of_current_line in terminal.py
 INSTALL_REQUIRES = [
-    "py>=1.5.0",
+    "py>=1.5.0,!=1.8.2,!=1.9.0",
     "packaging",
     "attrs>=17.4.0",  # should match oldattrs tox env.
     "more-itertools>=4.0.0",