diff --git a/.ci_support/environment-mpich.yml b/.ci_support/environment-mpich.yml
index 2875f21b..ac2119be 100644
--- a/.ci_support/environment-mpich.yml
+++ b/.ci_support/environment-mpich.yml
@@ -4,7 +4,7 @@ dependencies:
 - coverage
 - lammps =2024.06.27=*_mpi_mpich_*
 - mpich =4.2.2
-- numpy =1.26.4
+- numpy =2.1.1
 - mpi4py =4.0.0
 - executorlib =0.0.3
 - ase =3.23.0
diff --git a/.ci_support/environment-openmpi.yml b/.ci_support/environment-openmpi.yml
index 06b48856..0d78dc60 100644
--- a/.ci_support/environment-openmpi.yml
+++ b/.ci_support/environment-openmpi.yml
@@ -4,7 +4,7 @@ dependencies:
 - coverage
 - lammps =2024.06.27=*_mpi_openmpi_*
 - openmpi =5.0.5
-- numpy =1.26.4
+- numpy =2.1.1
 - mpi4py =4.0.0
 - executorlib =0.0.3
 - ase =3.23.0
diff --git a/binder/environment.yml b/binder/environment.yml
index 64b7cf1d..3150c0d4 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -2,7 +2,7 @@ channels:
 - conda-forge
 dependencies:
 - openmpi
-- numpy =1.26.4
+- numpy =2.1.1
 - lammps =2024.06.27
 - mpi4py =4.0.0
 - executorlib =0.0.3
diff --git a/pyproject.toml b/pyproject.toml
index 693d1364..f5f0cf79 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ classifiers = [
 dependencies = [
     "mpi4py==4.0.0",
     "executorlib==0.0.3",
-    "numpy==1.26.4",
+    "numpy==2.1.1",
 ]
 dynamic = ["version"]