diff --git a/setup.py b/setup.py
index 4e852d8d02800c34eb9229785278a25f096fa088..5e2bcf7441b32f66df1bb0e79913f4bb17c1d600 100644
--- a/setup.py
+++ b/setup.py
@@ -100,4 +100,5 @@ setup(name="sumpy",
           "pyrsistent>=0.16.0",
           "dataclasses>=0.7;python_version<='3.6'",
           "sympy>=0.7.2",
+          "pymbolic>=2021.1",
           ])