diff --git a/.ci_support/environment-docs.yml b/.ci_support/environment-docs.yml
index 16b9eaad..b61d9a6b 100644
--- a/.ci_support/environment-docs.yml
+++ b/.ci_support/environment-docs.yml
@@ -12,4 +12,4 @@ dependencies:
 - pyzmq =26.2.0
 - flux-core
 - jupyter-book =1.0.0
-- h5py =3.11.0
+- h5py =3.12.1
diff --git a/.ci_support/environment-mpich.yml b/.ci_support/environment-mpich.yml
index d2117f71..2fefcb40 100644
--- a/.ci_support/environment-mpich.yml
+++ b/.ci_support/environment-mpich.yml
@@ -7,7 +7,7 @@ dependencies:
 - cloudpickle =3.1.0
 - mpi4py =4.0.1
 - pyzmq =26.2.0
-- h5py =3.11.0
+- h5py =3.12.1
 - matplotlib =3.9.2
 - networkx =3.4.1
 - pygraphviz =1.14
diff --git a/.ci_support/environment-openmpi.yml b/.ci_support/environment-openmpi.yml
index fdfe5445..05b20cf7 100644
--- a/.ci_support/environment-openmpi.yml
+++ b/.ci_support/environment-openmpi.yml
@@ -7,7 +7,7 @@ dependencies:
 - cloudpickle =3.1.0
 - mpi4py =4.0.1
 - pyzmq =26.2.0
-- h5py =3.11.0
+- h5py =3.12.1
 - matplotlib =3.9.2
 - networkx =3.4.1
 - pygraphviz =1.14
diff --git a/.ci_support/environment-win.yml b/.ci_support/environment-win.yml
index c127fda6..82d8a991 100644
--- a/.ci_support/environment-win.yml
+++ b/.ci_support/environment-win.yml
@@ -7,7 +7,7 @@ dependencies:
 - cloudpickle =3.1.0
 - mpi4py =4.0.1
 - pyzmq =26.2.0
-- h5py =3.11.0
+- h5py =3.12.1
 - matplotlib =3.9.2
 - networkx =3.4.1
 - pygraphviz =1.14
diff --git a/binder/environment.yml b/binder/environment.yml
index 2486872f..fdcaa193 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -5,9 +5,9 @@ dependencies:
 - numpy
 - openmpi
 - cloudpickle =3.1.0
-- mpi4py =3.1.6
-- pyzmq =26.0.0
+- mpi4py =4.0.1
+- pyzmq =26.2.0
 - flux-core =0.59.0
 - flux-pmix =0.5.0
 - versioneer =0.28
-- h5py =3.11.0
+- h5py =3.12.1
diff --git a/pyproject.toml b/pyproject.toml
index 753163ff..633558a5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,7 +37,7 @@ Repository = "https://github.com/pyiron/executorlib"
 [project.optional-dependencies]
 mpi = ["mpi4py==4.0.1"]
 hdf = [
-    "h5py==3.11.0",
+    "h5py==3.12.1",
 ]
 graph = [
     "pygraphviz==1.14",