diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index c757b1179..5672ce92e 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -9,7 +9,7 @@ dependencies:
 - matplotlib-base =3.10.1
 - nglview =3.1.4
 - notebook
-- numpy =1.26.4
+- numpy =2.2.3
 - phonopy =2.38.0
 - plotly =6.0.0
 - pymatgen =2025.2.18
diff --git a/.ci_support/environment_mini.yml b/.ci_support/environment_mini.yml
index adcc8b754..4d37ac0ef 100644
--- a/.ci_support/environment_mini.yml
+++ b/.ci_support/environment_mini.yml
@@ -3,6 +3,6 @@ channels:
 dependencies:
 - ase =3.24.0
 - coverage
-- numpy =1.26.4
+- numpy =2.2.3
 - scipy =1.15.2
 - setuptools
diff --git a/pyproject.toml b/pyproject.toml
index 3bf13f9d5..645895e74 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -25,7 +25,7 @@ classifiers = [
 ]
 dependencies = [
     "ase==3.24.0",
-    "numpy==1.26.4",
+    "numpy==2.2.3",
     "scipy==1.15.2",
 ]
 dynamic = ["version"]