diff --git a/docs/requirements.txt b/docs/requirements.txt
index 044449040..9a81cc89c 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,5 @@
 # For generating documentation.
-Sphinx
+Sphinx < 7
 sphinx-rtd-theme # documentation theme
 sphinx_autodoc_typehints == 1.21.3
 nbsphinx
diff --git a/pulser-core/pulser/json/abstract_repr/validation.py b/pulser-core/pulser/json/abstract_repr/validation.py
index 09bd7f062..9b8cd7ec0 100644
--- a/pulser-core/pulser/json/abstract_repr/validation.py
+++ b/pulser-core/pulser/json/abstract_repr/validation.py
@@ -16,12 +16,12 @@
 from typing import Literal
 
 import jsonschema
+from referencing import Registry, Resource
 
-from pulser.json.abstract_repr import SCHEMAS, SCHEMAS_PATH
+from pulser.json.abstract_repr import SCHEMAS
 
-RESOLVER = jsonschema.validators.RefResolver(
-    base_uri=f"{SCHEMAS_PATH.resolve().as_uri()}/",
-    referrer=SCHEMAS["sequence"],
+REGISTRY: Registry = Registry().with_resources(
+    [("device-schema.json", Resource.from_contents(SCHEMAS["device"]))]
 )
 
 
@@ -37,5 +37,5 @@ def validate_abstract_repr(
     obj = json.loads(obj_str)
     validate_args = dict(instance=obj, schema=SCHEMAS[name])
     if name == "sequence":
-        validate_args["resolver"] = RESOLVER
+        validate_args["registry"] = REGISTRY
     jsonschema.validate(**validate_args)
diff --git a/pulser-core/requirements.txt b/pulser-core/requirements.txt
index 40cee3bfc..69fa4291c 100644
--- a/pulser-core/requirements.txt
+++ b/pulser-core/requirements.txt
@@ -1,4 +1,4 @@
-jsonschema < 4.18
+jsonschema >= 4.18
 matplotlib
 # Numpy 1.20 introduces type hints, 1.24.0 breaks matplotlib < 3.6.1
 numpy >= 1.20, != 1.24.0
diff --git a/tests/test_abstract_repr.py b/tests/test_abstract_repr.py
index 2d83ce41b..3558c7051 100644
--- a/tests/test_abstract_repr.py
+++ b/tests/test_abstract_repr.py
@@ -38,7 +38,7 @@
     AbstractReprEncoder,
     abstract_repr,
 )
-from pulser.json.abstract_repr.validation import RESOLVER
+from pulser.json.abstract_repr.validation import REGISTRY
 from pulser.json.exceptions import AbstractReprError, DeserializeDeviceError
 from pulser.parametrized.decorators import parametrize
 from pulser.parametrized.paramobj import ParamObj
@@ -282,7 +282,7 @@ def validate_schema(instance):
         "pulser-core/pulser/json/abstract_repr/schemas/" "sequence-schema.json"
     ) as f:
         schema = json.load(f)
-    jsonschema.validate(instance=instance, schema=schema, resolver=RESOLVER)
+    jsonschema.validate(instance=instance, schema=schema, registry=REGISTRY)
 
 
 class TestSerialization: