diff --git a/pydantic_schemaorg/SchemaOrgBase.py b/pydantic_schemaorg/SchemaOrgBase.py
index d0d8495d..c7333cf2 100644
--- a/pydantic_schemaorg/SchemaOrgBase.py
+++ b/pydantic_schemaorg/SchemaOrgBase.py
@@ -5,7 +5,7 @@
 from pydantic import BaseModel, Field, StrictBool, AnyUrl
 from pydantic.typing import update_model_forward_refs
 
-from ISO8601.ISO8601Date import ISO8601Date
+from pydantic_schemaorg.ISO8601.ISO8601Date import ISO8601Date
 from pydantic_schemaorg.__types__ import types
 
 updated_models=set()
diff --git a/src/templates/schema_org_base.py.tpl b/src/templates/schema_org_base.py.tpl
index d0d8495d..c7333cf2 100644
--- a/src/templates/schema_org_base.py.tpl
+++ b/src/templates/schema_org_base.py.tpl
@@ -5,7 +5,7 @@ from typing import Any, Optional, ForwardRef, List, Union
 from pydantic import BaseModel, Field, StrictBool, AnyUrl
 from pydantic.typing import update_model_forward_refs
 
-from ISO8601.ISO8601Date import ISO8601Date
+from pydantic_schemaorg.ISO8601.ISO8601Date import ISO8601Date
 from pydantic_schemaorg.__types__ import types
 
 updated_models=set()