diff --git a/.ci_support/environment-docs.yml b/.ci_support/environment-docs.yml
index 15a75bc6..63f1dfe1 100644
--- a/.ci_support/environment-docs.yml
+++ b/.ci_support/environment-docs.yml
@@ -16,5 +16,5 @@ dependencies:
 - jupyter-book =1.0.0
 - mpi4py =4.1.2
 - python =3.12
-- pydantic =2.13.4
+- pydantic =2.13.5
 - pyzmq =27.2.0
diff --git a/.ci_support/environment-integration.yml b/.ci_support/environment-integration.yml
index 38577a35..488c0fc1 100644
--- a/.ci_support/environment-integration.yml
+++ b/.ci_support/environment-integration.yml
@@ -17,7 +17,7 @@ dependencies:
 - ipython =9.9.0
 - matplotlib =3.10.8
 - networkx =3.6.1
-- pydantic =2.13.4
+- pydantic =2.13.5
 - pygraphviz =1.14
 - pysqa =0.4.4
 - pyzmq =27.2.0
diff --git a/.ci_support/environment-mpich.yml b/.ci_support/environment-mpich.yml
index e06295ab..9f3552fc 100644
--- a/.ci_support/environment-mpich.yml
+++ b/.ci_support/environment-mpich.yml
@@ -11,7 +11,7 @@ dependencies:
 - ipython =9.9.0
 - mpi4py =4.1.2
 - networkx =3.6.1
-- pydantic =2.13.4
+- pydantic =2.13.5
 - pygraphviz =1.14
 - pysqa =0.4.4
 - pyzmq =27.2.0
diff --git a/.ci_support/environment-openmpi.yml b/.ci_support/environment-openmpi.yml
index 27ed883c..a52c3c8e 100644
--- a/.ci_support/environment-openmpi.yml
+++ b/.ci_support/environment-openmpi.yml
@@ -11,7 +11,7 @@ dependencies:
 - ipython =9.9.0
 - mpi4py =4.1.2
 - networkx =3.6.1
-- pydantic =2.13.4
+- pydantic =2.13.5
 - pygraphviz =1.14
 - pysqa =0.4.4
 - pyzmq =27.2.0
diff --git a/.ci_support/environment-win.yml b/.ci_support/environment-win.yml
index df98d0e1..8108d051 100644
--- a/.ci_support/environment-win.yml
+++ b/.ci_support/environment-win.yml
@@ -11,6 +11,6 @@ dependencies:
 - ipython =9.9.0
 - mpi4py =4.1.2
 - networkx =3.6.1
-- pydantic =2.13.4
+- pydantic =2.13.5
 - pygraphviz =1.14
 - pyzmq =27.2.0
diff --git a/pyproject.toml b/pyproject.toml
index 0755a2a9..a1f29eb1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,13 +57,13 @@ cluster = [
     "h5py==3.16.0",
 ]
 validation = [
-    "pydantic==2.13.4",
+    "pydantic==2.13.5",
 ]
 all = [
     "mpi4py==4.1.2",
     "pysqa==0.4.4",
     "h5py==3.16.0",
-    "pydantic==2.13.4",
+    "pydantic==2.13.5",
     "pygraphviz==1.14",
     "networkx==3.6.1",
     "ipython==9.9.0",