diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index bf20861..336ef71 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -37,7 +37,7 @@ jobs:
     - name: install Poetry
       uses: snok/install-poetry@v1.3.3
     - name: cache Poetry virtualenv
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       id: cache
       with:
         path: ~/.virtualenvs/
diff --git a/api/db/models/bills.py b/api/db/models/bills.py
index b41644f..dfadd39 100644
--- a/api/db/models/bills.py
+++ b/api/db/models/bills.py
@@ -161,12 +161,14 @@ class DocumentLinkBase(PrimaryUUID):
 class BillDocument(DocVerBase, Base):
     __tablename__ = "opencivicdata_billdocument"
 
+    classification = Column(String)
     links = relationship("BillDocumentLink", back_populates="document")
 
 
 class BillVersion(DocVerBase, Base):
     __tablename__ = "opencivicdata_billversion"
 
+    classification = Column(String)
     links = relationship("BillVersionLink", back_populates="version")
 
 
diff --git a/api/schemas.py b/api/schemas.py
index da19841..0615602 100644
--- a/api/schemas.py
+++ b/api/schemas.py
@@ -294,6 +294,7 @@ class BillDocumentOrVersion(BaseModel):
     id: UUID = Field(..., example="f0049138-1ad8-4506-a2a4-f4dd1251bbba")
     note: str = Field(..., example="Latest Version")
     date: str = Field(..., example="2020-10-01")
+    classification: str = Field(..., example="amendment")
     links: List[BillDocumentLink]
 
     class Config:
diff --git a/api/tests/fixtures.py b/api/tests/fixtures.py
index 1f6e488..4978666 100644
--- a/api/tests/fixtures.py
+++ b/api/tests/fixtures.py
@@ -91,13 +91,13 @@ def create_test_bill(
     for n in range(sources):
         yield BillSource(bill=b, url="https://example.com/source", note="")
     for n in range(versions):
-        bv = BillVersion(bill=b, note=f"Version {n}", date="2020")
+        bv = BillVersion(bill=b, note=f"Version {n}", date="2020", classification="")
         yield bv
         yield BillVersionLink(
             version=bv, url=f"https://example.com/{n}", media_type="text/html"
         )
     for n in range(documents):
-        bd = BillDocument(bill=b, note=f"Version {n}", date="2020")
+        bd = BillDocument(bill=b, note=f"Version {n}", date="2020", classification="")
         yield bd
         yield BillDocumentLink(
             document=bd, url=f"https://example.com/{n}", media_type="text/html"
diff --git a/api/tests/test_bills.py b/api/tests/test_bills.py
index f82f78f..3253bea 100644
--- a/api/tests/test_bills.py
+++ b/api/tests/test_bills.py
@@ -210,6 +210,7 @@ def test_bills_include_documents_versions(client):
             "note": "Version 0",
             "date": "2020",
             "links": [{"media_type": "text/html", "url": "https://example.com/0"}],
+            "classification": "",
         }
 
         for doc in b["documents"]: