diff --git a/asdf/_jsonschema/exceptions.py b/asdf/_jsonschema/exceptions.py
index 7114167c7..68a8688e1 100644
--- a/asdf/_jsonschema/exceptions.py
+++ b/asdf/_jsonschema/exceptions.py
@@ -176,7 +176,7 @@ class SchemaError(_Error):
     _word_for_instance_in_error_message = "schema"
 
 
-@attr.s(hash=True)
+@attr.s(unsafe_hash=True)
 class RefResolutionError(Exception):
     """
     A ref could not be resolved.
diff --git a/asdf/_jsonschema/tests/_suite.py b/asdf/_jsonschema/tests/_suite.py
index bf07556fa..f70324229 100644
--- a/asdf/_jsonschema/tests/_suite.py
+++ b/asdf/_jsonschema/tests/_suite.py
@@ -35,7 +35,7 @@ def _find_suite():
     return root
 
 
-@attr.s(hash=True)
+@attr.s(unsafe_hash=True)
 class Suite:
 
     _root = attr.ib(default=attr.Factory(_find_suite))
@@ -62,7 +62,7 @@ def version(self, name):
         )
 
 
-@attr.s(hash=True)
+@attr.s(unsafe_hash=True)
 class Version:
 
     _path = attr.ib()
@@ -139,7 +139,7 @@ def _tests_in(self, subject, path):
             )
 
 
-@attr.s(hash=True, repr=False)
+@attr.s(unsafe_hash=True, repr=False)
 class _Test:
 
     version = attr.ib()
diff --git a/pyproject.toml b/pyproject.toml
index 698d908e5..dc347ab0d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ dependencies = [
   "pyyaml>=5.4.1",
   "semantic_version>=2.8",
   # for vendorized jsonschema
-  "attrs>=20.1.0",
+  "attrs>=22.2.0",
   # end of vendorized jsonschema deps
 ]
 [project.optional-dependencies]