diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index 20985e3f..4046c63c 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -3,7 +3,7 @@ channels:
 dependencies:
 - ase =3.28.0
 - coverage
-- lxml =6.0.2
+- lxml =6.0.4
 - mendeleev =1.1.0
 - numpy =2.4.3
 - pandas =2.3.3
diff --git a/pyproject.toml b/pyproject.toml
index ac96d6ca..d90a53c1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -60,7 +60,7 @@ lammps_phonons = [
     "lammpsparser==0.0.2",
 ]
 experimental = [
-    "lxml==6.0.2",
+    "lxml==6.0.4",
     "mendeleev==1.1.0",
     "pandas==2.3.3",
     "requests==2.32.5",