diff --git a/.ci_support/environment-gpaw.yml b/.ci_support/environment-gpaw.yml
index 0c314825..ed5fc981 100644
--- a/.ci_support/environment-gpaw.yml
+++ b/.ci_support/environment-gpaw.yml
@@ -1,7 +1,7 @@
 channels:
 - conda-forge
 dependencies:
-- gpaw =25.7.0
+- gpaw =26.7.0
 - phonopy =4.3.1
 - structuretoolkit =0.0.45
 - seekpath =2.2.1
diff --git a/.ci_support/environment-notebooks.yml b/.ci_support/environment-notebooks.yml
index fd81061a..dc74d944 100644
--- a/.ci_support/environment-notebooks.yml
+++ b/.ci_support/environment-notebooks.yml
@@ -3,7 +3,7 @@ channels:
 dependencies:
 - jupyter
 - papermill
-- gpaw =25.7.0
+- gpaw =26.7.0
 - lammps =2025.07.22
 - pandas =3.0.3
 - pylammpsmpi =0.4.0
diff --git a/binder/environment.yml b/binder/environment.yml
index 0ea3683c..06c0cf9c 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -8,7 +8,7 @@ dependencies:
 - phonopy =4.3.1
 - structuretoolkit =0.0.45
 - seekpath =2.2.1
-- gpaw =25.7.0
+- gpaw =26.7.0
 - lammps =2025.07.22
 - pandas =3.0.3
 - pylammpsmpi =0.4.0
diff --git a/pyproject.toml b/pyproject.toml
index b1fe0715..559ba8eb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ phonopy = [
     "structuretoolkit==0.0.45",
 ]
 gpaw = [
-    "gpaw==25.7.0",
+    "gpaw==26.7.0",
 ]
 lammps = [
     "pylammpsmpi==0.4.0",