diff --git a/.ci_support/environment-mpich.yml b/.ci_support/environment-mpich.yml
index e05de13..d98cddf 100644
--- a/.ci_support/environment-mpich.yml
+++ b/.ci_support/environment-mpich.yml
@@ -7,7 +7,7 @@ dependencies:
 - numpy =2.3.1
 - mpi4py =4.1.0
 - executorlib =1.6.1
-- ase =3.25.0
+- ase =3.26.0
 - scipy =1.16.0
 - hatchling
 - hatch-vcs
diff --git a/.ci_support/environment-openmpi.yml b/.ci_support/environment-openmpi.yml
index 3a9c95e..2d29681 100644
--- a/.ci_support/environment-openmpi.yml
+++ b/.ci_support/environment-openmpi.yml
@@ -7,7 +7,7 @@ dependencies:
 - numpy =2.3.1
 - mpi4py =4.1.0
 - executorlib =1.6.1
-- ase =3.25.0
+- ase =3.26.0
 - scipy =1.16.0
 - hatchling
 - hatch-vcs
diff --git a/binder/environment.yml b/binder/environment.yml
index 531d869..2a033cd 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -8,5 +8,5 @@ dependencies:
 - lammps =2024.08.29=*_mpi_openmpi_*
 - mpi4py =4.1.0
 - executorlib =1.6.1
-- ase =3.25.0
+- ase =3.26.0
 - scipy =1.16.0
diff --git a/pyproject.toml b/pyproject.toml
index a8bbbc9..d12f14f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ Repository = "https://github.com/pyiron/pylammpsmpi"
 
 [project.optional-dependencies]
 ase = [
-    "ase==3.25.0",
+    "ase==3.26.0",
     "scipy==1.16.0",
 ]