diff --git a/.ci_support/environment-docs.yml b/.ci_support/environment-docs.yml
index fb7e0ed0..5580f111 100644
--- a/.ci_support/environment-docs.yml
+++ b/.ci_support/environment-docs.yml
@@ -8,7 +8,7 @@ dependencies:
 - numpy
 - openmpi
 - cloudpickle =3.1.1
-- mpi4py =4.0.1
+- mpi4py =4.0.2
 - pyzmq =26.2.1
 - flux-core
 - jupyter-book =1.0.0
diff --git a/.ci_support/environment-mpich.yml b/.ci_support/environment-mpich.yml
index 37353d56..0fd9ee56 100644
--- a/.ci_support/environment-mpich.yml
+++ b/.ci_support/environment-mpich.yml
@@ -5,7 +5,7 @@ dependencies:
 - numpy
 - mpich
 - cloudpickle =3.1.1
-- mpi4py =4.0.1
+- mpi4py =4.0.2
 - pyzmq =26.2.1
 - h5py =3.12.1
 - networkx =3.4.2
diff --git a/.ci_support/environment-openmpi.yml b/.ci_support/environment-openmpi.yml
index bf167b00..b6ec4d7b 100644
--- a/.ci_support/environment-openmpi.yml
+++ b/.ci_support/environment-openmpi.yml
@@ -5,7 +5,7 @@ dependencies:
 - numpy
 - openmpi
 - cloudpickle =3.1.1
-- mpi4py =4.0.1
+- mpi4py =4.0.2
 - pyzmq =26.2.1
 - h5py =3.12.1
 - networkx =3.4.2
diff --git a/.ci_support/environment-win.yml b/.ci_support/environment-win.yml
index 8af50413..99d2a626 100644
--- a/.ci_support/environment-win.yml
+++ b/.ci_support/environment-win.yml
@@ -5,7 +5,7 @@ dependencies:
 - numpy
 - msmpi
 - cloudpickle =3.1.1
-- mpi4py =4.0.1
+- mpi4py =4.0.2
 - pyzmq =26.2.1
 - h5py =3.12.1
 - networkx =3.4.2
diff --git a/binder/environment.yml b/binder/environment.yml
index 1e580e45..ade27d53 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -5,7 +5,7 @@ dependencies:
 - numpy
 - openmpi
 - cloudpickle =3.1.1
-- mpi4py =4.0.1
+- mpi4py =4.0.2
 - pyzmq =26.2.1
 - flux-core =0.59.0
 - flux-pmix =0.5.0
diff --git a/pyproject.toml b/pyproject.toml
index d0eec858..a4f725c5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,13 +46,13 @@ graphnotebook = [
     "networkx==3.4.2",
     "ipython==8.32.0",
 ]
-mpi = ["mpi4py==4.0.1"]
+mpi = ["mpi4py==4.0.2"]
 cluster = [
     "pysqa==0.2.3",
     "h5py==3.12.1",
 ]
 all = [
-    "mpi4py==4.0.1",
+    "mpi4py==4.0.2",
     "pysqa==0.2.3",
     "h5py==3.12.1",
     "pygraphviz==1.14",