diff --git a/pyproject.toml b/pyproject.toml
index 4d5eea7..24a404b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -130,7 +130,7 @@ pyscf = [
 # imports SciPy but does not declare it in its own wheel metadata, so QuantUI's
 # extra supplies and caps that runtime dependency explicitly.
 pyfock = [
-    "pyfock>=0.1.7,<0.2",
+    "pyfock>=0.1.7,<0.3",
     # PyFock's ASE calculator is the geometry-optimization path used by
     # QuantUI; include ASE here so the documented backend extra is complete.
     "ase>=3.22.0,<4",