diff --git a/fairscape_models/fairscape_base.py b/fairscape_models/fairscape_base.py
index 0d716a9..ed353f4 100644
--- a/fairscape_models/fairscape_base.py
+++ b/fairscape_models/fairscape_base.py
@@ -22,7 +22,7 @@
 
 # Persistent identifiers accepted for digital objects: ARKs, DOIs (bare or
 # resolver-URL form), and http(s) URIs.
-PersistentIdentifierPattern = "^(ark:[0-9]{5}/.+|doi:.+|https?://.+)$"
+PersistentIdentifierPattern = "^(ark:[0-9]{5}/.+|doi:.+|https?://.+|file://.+)$"
 
 DATASET_TYPE = "Dataset"
 DATASET_CONTAINER_TYPE = "DatasetContainer"
diff --git a/pyproject.toml b/pyproject.toml
index bc18c31..ef2afe7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "fairscape-models"
-version = "1.2.2"
+version = "1.2.3"
 description = "Fairscape pydantic models"
 readme = "README.md"
 authors = [