diff --git a/pyproject.toml b/pyproject.toml
index 4d665b17..d291caae 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,8 @@ dependencies = [
     "tabulate",
     "matplotlib>=3.5.2",
     "numpy>=1.21.0",
-    "pymatgen>=2023.11.12",  # limiting factor: POTCAR_STATS_PATH available from pymatgen.io.vasp.inputs
+    "pymatgen>=2024.5.31",  # limiting factor: breaking changes in `VaspInputSet`;
+    # https://github.com/materialsproject/pymatgen/issues/3860
     "spglib>=2.4.0",  # previously explicitly set to <=2.0.2 to avoid unnecessary warnings
     # (https://github.com/spglib/spglib/issues/338) but causing dependency issues
     # (https://github.com/SMTG-Bham/doped/issues/73), being worked on in