diff --git a/setup.py b/setup.py
index 6c684f546041965e01eff5d283aaa20ace6e321a..c84a63fe30b6c623090bab9c9b88da77d05ac62d 100644
--- a/setup.py
+++ b/setup.py
@@ -89,7 +89,7 @@ setup(name="loo.py",
           ],
 
       install_requires=[
-          "pytools>=2018.2",
+          "pytools>=2018.3",
           "pymbolic>=2016.2",
           "genpy>=2016.1.2",
           "cgen>=2016.1",