diff --git a/dandischema/models.py b/dandischema/models.py
index 20af8bd..fb15d03 100644
--- a/dandischema/models.py
+++ b/dandischema/models.py
@@ -119,8 +119,12 @@ class IdentifierType(Enum):
 class LicenseType(Enum):
     """An enumeration of supported licenses"""
 
+    # DANDI-specific -- supported within https://spdx.org/licenses/
     CC0_10 = "spdx:CC0-1.0"
     CC_BY_40 = "spdx:CC-BY-4.0"
+    # LINC Brain, other specific
+    UNLICENSED = "unlicensed"
+    PRIVATE = "private"
 
 
 class RelationType(Enum):
@@ -1045,9 +1049,9 @@ class Activity(DandiBaseModel):
 
     # isPartOf: Optional["Activity"] = Field(None, json_schema_extra={"nskey": "schema"})
     # hasPart: Optional["Activity"] = Field(None, json_schema_extra={"nskey": "schema"})
-    wasAssociatedWith: Optional[List[Union[Person, Organization, Software, Agent]]] = (
-        Field(None, json_schema_extra={"nskey": "prov"})
-    )
+    wasAssociatedWith: Optional[
+        List[Union[Person, Organization, Software, Agent]]
+    ] = Field(None, json_schema_extra={"nskey": "prov"})
     used: Optional[List[Equipment]] = Field(
         None,
         description="A listing of equipment used for the activity.",
diff --git a/dandischema/tests/test_models.py b/dandischema/tests/test_models.py
index a5bc368..74321d7 100644
--- a/dandischema/tests/test_models.py
+++ b/dandischema/tests/test_models.py
@@ -321,6 +321,8 @@ def test_asset_digest() -> None:
             {
                 "CC0_10": "spdx:CC0-1.0",
                 "CC_BY_40": "spdx:CC-BY-4.0",
+                "PRIVATE": "private",
+                "UNLICENSED": "unlicensed",
             },
         ),
         (