diff --git a/.ci_support/environment-docs.yml b/.ci_support/environment-docs.yml
index 2091f02d..6708d6fc 100644
--- a/.ci_support/environment-docs.yml
+++ b/.ci_support/environment-docs.yml
@@ -11,7 +11,7 @@ dependencies:
 - openmpi
 - cloudpickle =3.1.1
 - mpi4py =4.0.1
-- pyzmq =26.4.0
+- pyzmq =27.0.0
 - flux-core
 - jupyter-book =1.0.0
 - h5py =3.14.0
diff --git a/.ci_support/environment-integration.yml b/.ci_support/environment-integration.yml
index 4cf99cfd..211ac1ef 100644
--- a/.ci_support/environment-integration.yml
+++ b/.ci_support/environment-integration.yml
@@ -7,7 +7,7 @@ dependencies:
 - openmpi
 - cloudpickle =3.1.1
 - mpi4py
-- pyzmq =26.3.0
+- pyzmq =27.0.0
 - flux-core =0.59.0
 - hatchling =1.27.0
 - hatch-vcs =0.5.0
diff --git a/.ci_support/environment-mini.yml b/.ci_support/environment-mini.yml
index e960676f..4c381695 100644
--- a/.ci_support/environment-mini.yml
+++ b/.ci_support/environment-mini.yml
@@ -4,6 +4,6 @@ dependencies:
 - python
 - numpy
 - cloudpickle =3.1.0
-- pyzmq =26.2.0
+- pyzmq =27.0.0
 - hatchling =1.27.0
 - hatch-vcs =0.5.0
diff --git a/.ci_support/environment-mpich.yml b/.ci_support/environment-mpich.yml
index 3d89276f..c2e39a16 100644
--- a/.ci_support/environment-mpich.yml
+++ b/.ci_support/environment-mpich.yml
@@ -6,7 +6,7 @@ dependencies:
 - mpich
 - cloudpickle =3.1.1
 - mpi4py =4.0.1
-- pyzmq =26.4.0
+- pyzmq =27.0.0
 - h5py =3.14.0
 - networkx =3.4.2
 - pygraphviz =1.14
diff --git a/.ci_support/environment-openmpi.yml b/.ci_support/environment-openmpi.yml
index ed1af3e4..a8cb0007 100644
--- a/.ci_support/environment-openmpi.yml
+++ b/.ci_support/environment-openmpi.yml
@@ -6,7 +6,7 @@ dependencies:
 - openmpi
 - cloudpickle =3.1.1
 - mpi4py =4.0.1
-- pyzmq =26.4.0
+- pyzmq =27.0.0
 - h5py =3.14.0
 - networkx =3.4.2
 - pygraphviz =1.14
diff --git a/.ci_support/environment-win.yml b/.ci_support/environment-win.yml
index 790ed115..5deb1ca8 100644
--- a/.ci_support/environment-win.yml
+++ b/.ci_support/environment-win.yml
@@ -6,7 +6,7 @@ dependencies:
 - msmpi
 - cloudpickle =3.1.1
 - mpi4py =4.0.1
-- pyzmq =26.4.0
+- pyzmq =27.0.0
 - h5py =3.14.0
 - networkx =3.4.2
 - pygraphviz =1.14
diff --git a/binder/environment.yml b/binder/environment.yml
index f7bd512d..0becb9ad 100644
--- a/binder/environment.yml
+++ b/binder/environment.yml
@@ -6,7 +6,7 @@ dependencies:
 - openmpi
 - cloudpickle =3.1.1
 - mpi4py =4.0.1
-- pyzmq =26.4.0
+- pyzmq =27.0.0
 - flux-core =0.59.0
 - flux-pmix =0.5.0
 - hatchling =1.27.0
diff --git a/pyproject.toml b/pyproject.toml
index 6f68afdb..c4f22ad4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ requires = [
     "hatchling==1.27.0",
     "hatch-vcs==0.5.0",
     "cloudpickle==3.1.1",
-    "pyzmq==26.4.0",
+    "pyzmq==27.0.0",
 ]
 build-backend = "hatchling.build"
 
@@ -31,7 +31,7 @@ classifiers = [
 ]
 dependencies = [
     "cloudpickle==3.1.1",
-    "pyzmq==26.4.0",
+    "pyzmq==27.0.0",
 ]
 dynamic = ["version"]
 
@@ -120,4 +120,4 @@ packages = [
 
 [tool.hatch.version]
 source = "vcs"
-path = "executorlib/_version.py"
\ No newline at end of file
+path = "executorlib/_version.py"