diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index 88737e4f3..83c9ab9bc 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -12,7 +12,7 @@ dependencies:
 - numpy =2.3.4
 - phonopy =2.43.6
 - plotly =6.3.1
-- pymatgen =2025.6.14
+- pymatgen =2025.10.7
 - pyscal3 =3.3.0
 - scikit-learn =1.7.2
 - scipy =1.16.3
diff --git a/pyproject.toml b/pyproject.toml
index a6743a11b..9a3937b6e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -39,7 +39,7 @@ Repository = "https://github.com/pyiron/structuretoolkit"
 dscribe = ["dscribe==2.1.2"]
 grainboundary = [
     "aimsgb==1.1.1",
-    "pymatgen==2025.6.14",
+    "pymatgen==2025.10.7",
 ]
 pyscal = ["pyscal3==3.3.0"]
 nglview = ["nglview==3.1.4"]
@@ -49,7 +49,7 @@ clusters = ["scikit-learn==1.7.2"]
 symmetry = ["spglib==2.6.0"]
 surface = [
     "spglib==2.6.0",
-    "pymatgen==2025.6.14",
+    "pymatgen==2025.10.7",
 ]
 phonopy = [
     "phonopy==2.43.6",