diff --git a/pyproject.toml b/pyproject.toml
index 1f1a79e2..1bd72f29 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,15 +42,14 @@ dependencies = [
     "z3-solver>=4.12,<4.14",
     "qecsim",
     "ldpc>=0.1.53",
-    "numpy>=1.26; python_version > '3.11'",
-    "numpy>=1.24; python_version <= '3.11'",
+    "numpy>=1.26,<2.0; python_version > '3.11'",
+    "numpy>=1.24,<2.0; python_version <= '3.11'",
     "qiskit[qasm3-import]>=1.0.0",
     "qiskit-aer>=0.15.0",
     "stim >= 1.13.0",
     "multiprocess >= 0.70.16",
     "bposd>=1.6",
     "numba>=0.59; python_version > '3.11'",
-    "numpy>=0.57; python_version <= '3.11'",
     "pymatching>=2.2; python_version > '3.11'",
     "pymatching>=2; python_version <= '3.11'",
 ]