diff --git a/.ci_support/environment-docs.yml b/.ci_support/environment-docs.yml
index 20fdb9fd..0dfafee2 100644
--- a/.ci_support/environment-docs.yml
+++ b/.ci_support/environment-docs.yml
@@ -15,5 +15,5 @@ dependencies:
 - jupyter-book =1.0.0
 - mpi4py =4.1.1
 - python =3.12
-- pydantic =2.12.4
+- pydantic =2.12.5
 - pyzmq =27.1.0
diff --git a/.ci_support/environment-integration.yml b/.ci_support/environment-integration.yml
index e0c88a0d..c2c0f4db 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 =2.12.4
+- pydantic =2.12.5
 - pygraphviz =1.14
 - pysqa =0.3.5
 - pyzmq =27.1.0
diff --git a/.ci_support/environment-mpich.yml b/.ci_support/environment-mpich.yml
index 321d895a..158f1e6d 100644
--- a/.ci_support/environment-mpich.yml
+++ b/.ci_support/environment-mpich.yml
@@ -11,7 +11,7 @@ dependencies:
 - ipython =9.9.0
 - mpi4py =4.1.1
 - networkx =3.6.1
-- pydantic =2.12.4
+- pydantic =2.12.5
 - pygraphviz =1.14
 - pysqa =0.3.5
 - pyzmq =27.1.0
diff --git a/.ci_support/environment-openmpi.yml b/.ci_support/environment-openmpi.yml
index 5a7418d9..eeb7a97a 100644
--- a/.ci_support/environment-openmpi.yml
+++ b/.ci_support/environment-openmpi.yml
@@ -11,7 +11,7 @@ dependencies:
 - ipython =9.9.0
 - mpi4py =4.1.1
 - networkx =3.6.1
-- pydantic =2.12.4
+- pydantic =2.12.5
 - pygraphviz =1.14
 - pysqa =0.3.5
 - pyzmq =27.1.0
diff --git a/.ci_support/environment-win.yml b/.ci_support/environment-win.yml
index 1d33761e..9269ca1c 100644
--- a/.ci_support/environment-win.yml
+++ b/.ci_support/environment-win.yml
@@ -11,6 +11,6 @@ dependencies:
 - ipython =9.9.0
 - mpi4py =4.1.1
 - networkx =3.6.1
-- pydantic =2.12.4
+- pydantic =2.12.5
 - pygraphviz =1.14
 - pyzmq =27.1.0
diff --git a/pyproject.toml b/pyproject.toml
index 92985896..1fb1f66c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -56,13 +56,13 @@ cluster = [
     "h5py==3.15.1",
 ]
 validation = [
-    "pydantic==2.12.4",
+    "pydantic==2.12.5",
 ]
 all = [
     "mpi4py==4.1.1",
     "pysqa==0.3.5",
     "h5py==3.15.1",
-    "pydantic==2.12.4",
+    "pydantic==2.12.5",
     "pygraphviz==1.14",
     "networkx==3.6.1",
     "ipython==9.9.0",