diff --git a/.ci_support/environment-docs.yml b/.ci_support/environment-docs.yml
index d4e10b63a..1d428e629 100644
--- a/.ci_support/environment-docs.yml
+++ b/.ci_support/environment-docs.yml
@@ -13,7 +13,7 @@ dependencies:
 - matplotlib-base =3.9.2
 - mendeleev =0.17.0
 - mp-api =0.42.1
-- numpy =1.26.4
+- numpy =2.1.0
 - pandas =2.2.2
 - phonopy =2.26.6
 - pint =0.24.3
diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index f083c9480..2337e5f1f 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -11,7 +11,7 @@ dependencies:
 - matplotlib-base =3.9.2
 - mendeleev =0.17.0
 - mp-api =0.42.1
-- numpy =1.26.4
+- numpy =2.1.0
 - pandas =2.2.2
 - phonopy =2.26.6
 - pint =0.24.3
diff --git a/binder/environment.yml b/binder/environment.yml
index dd2697b52..0b7c69c38 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -9,7 +9,7 @@ dependencies:
 - matplotlib-base =3.9.2
 - mendeleev =0.17.0
 - mp-api =0.42.1
-- numpy =1.26.4
+- numpy =2.1.0
 - pandas =2.2.2
 - phonopy =2.26.6
 - pint =0.24.3
diff --git a/pyproject.toml b/pyproject.toml
index b998a22da..5422c5c0f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ dependencies = [
     "matplotlib==3.9.2",
     "mendeleev==0.17.0",
     "mp-api==0.42.1",
-    "numpy==1.26.4",
+    "numpy==2.1.0",
     "pandas==2.2.2",
     "phonopy==2.26.6",
     "pint==0.24.3",