diff --git a/setup.py b/setup.py
index 9d8bd016..6811324f 100644
--- a/setup.py
+++ b/setup.py
@@ -31,6 +31,7 @@
         "numpy<=1.26.3",
         "openfermion>=1.5.1",
         "pennylane>=0.29.1",
+        "pennylane<=0.33.1",
         "scipy>=1.5.2",
     ],
     extras_require={