diff --git a/pyproject.toml b/pyproject.toml
index 07d401d..c361c61 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ authors = [
     {name = "Andrew Lytle", email="atlytle@illinois.edu"},
 ]
 dependencies = [
-    "qiskit",
+    "qiskit < 0.43.0",
     "psfam"
 ]
 license = {file = "LICENSE.txt"}