diff --git a/deps/pymatgen_requirements.txt b/deps/pymatgen_requirements.txt
index c41c392..0105034 100644
--- a/deps/pymatgen_requirements.txt
+++ b/deps/pymatgen_requirements.txt
@@ -13,4 +13,5 @@ pillow >= 10.1.0;python_version=='3.12' and sys_platform=='linux'   # min recomm
 pymatgen >= 2024.8.9 # min working
 pyparsing >= 3.0.0 # min working
 ruamel-yaml >= 0.17.2
+sympy >= 1.13.3;python_version=='3.12'
 uncertainties >= 3.1.7