diff --git a/.binder/environment.yml b/.binder/environment.yml
index 7fa935ee..6c1bb179 100644
--- a/.binder/environment.yml
+++ b/.binder/environment.yml
@@ -4,7 +4,7 @@ dependencies:
 - hatchling =1.32.0
 - hatch-vcs =0.5.0
 - packaging =26.3
-- pydantic =2.12.5
+- pydantic =2.13.5
 - pyiron_snippets =1.5.0
 - typing-extensions =4.16.0
 - bagofholding =0.1.12
diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index 389bafe1..98255073 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -4,6 +4,6 @@ dependencies:
 - hatchling =1.32.0
 - hatch-vcs =0.5.0
 - packaging =26.3
-- pydantic =2.12.5
+- pydantic =2.13.5
 - pyiron_snippets =1.5.0
 - typing-extensions =4.16.0
diff --git a/docs/environment.yml b/docs/environment.yml
index a6fed4ba..b39051b9 100644
--- a/docs/environment.yml
+++ b/docs/environment.yml
@@ -10,7 +10,7 @@ dependencies:
 - hatchling =1.32.0
 - hatch-vcs =0.5.0
 - packaging =26.3
-- pydantic =2.12.5
+- pydantic =2.13.5
 - pyiron_snippets =1.5.0
 - typing-extensions =4.16.0
 - bagofholding =0.1.12
diff --git a/pyproject.toml b/pyproject.toml
index 20449e42..29a96fa0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ classifiers = [
 ]
 dependencies = [
     "packaging==26.3",
-    "pydantic==2.12.5",
+    "pydantic==2.13.5",
     "pyiron_snippets==1.5.0",
     "typing-extensions==4.16.0",
 ]