diff --git a/setup.py b/setup.py
index 5eea0c3aa3225ce078d58a0f97314cb33c789945..08bb10b10a9c2d3f1ad0617bcb3cff830d873b43 100644
--- a/setup.py
+++ b/setup.py
@@ -38,7 +38,7 @@ setup(name="loo.py",
 
       install_requires=[
           "pytools>=2016.1",
-          "pymbolic>=2016.1",
+          "pymbolic>=2016.1.1",
           "cgen>=2016.1",
           "islpy>=2016.1",
           "six>=1.8.0",