diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index 6b14dac8dc55e..915e0842c44e5 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -91,12 +91,26 @@
 )
 
 
+def _version_str_to_tuple(version: str) -> tuple[int, ...]:
+    version_tuple = []
+    for part in version.split("."):
+        numeric_prefix = ""
+        for char in part:
+            if not char.isdigit():
+                break
+            numeric_prefix += char
+        if not numeric_prefix:
+            break
+        version_tuple.append(int(numeric_prefix))
+    return tuple(version_tuple)
+
+
 def ensure_multipart_is_installed() -> None:
     try:
         from python_multipart import __version__
 
         # Import an attribute that can be mocked/deleted in testing
-        assert __version__ > "0.0.12"
+        assert _version_str_to_tuple(__version__) > (0, 0, 12)
     except (ImportError, AssertionError):
         try:
             # __version__ is available in both multiparts, and can be mocked
diff --git a/tests/test_dependencies_utils.py b/tests/test_dependencies_utils.py
index 9257d1c9ee6cc..92d735bb6285b 100644
--- a/tests/test_dependencies_utils.py
+++ b/tests/test_dependencies_utils.py
@@ -1,4 +1,11 @@
-from fastapi.dependencies.utils import get_typed_annotation
+from fastapi.dependencies.utils import _version_str_to_tuple, get_typed_annotation
+
+
+def test_version_str_to_tuple():
+    assert _version_str_to_tuple("0.0.12") == (0, 0, 12)
+    assert _version_str_to_tuple("0.0.100") == (0, 0, 100)
+    assert _version_str_to_tuple("1.2.3a1") == (1, 2, 3)
+    assert _version_str_to_tuple("") == ()
 
 
 def test_get_typed_annotation():
diff --git a/tests/test_multipart_installation.py b/tests/test_multipart_installation.py
index 9c3e47c495990..4bf1a67a936ff 100644
--- a/tests/test_multipart_installation.py
+++ b/tests/test_multipart_installation.py
@@ -147,3 +147,15 @@ def test_old_multipart_installed(monkeypatch):
         @app.post("/")
         async def root(username: str = Form()):
             return username  # pragma: nocover
+
+
+def test_new_multipart_version_without_multipart_alias(monkeypatch):
+    monkeypatch.setattr("python_multipart.__version__", "0.0.100")
+    with warnings.catch_warnings(record=True):
+        warnings.simplefilter("always")
+        monkeypatch.delattr("multipart.__version__", raising=False)
+        app = FastAPI()
+
+        @app.post("/")
+        async def root(username: str = Form()):
+            return username  # pragma: nocover