diff --git a/fastapi_crudrouter/core/_utils.py b/fastapi_crudrouter/core/_utils.py
index ef3562e4..4ac482e5 100644
--- a/fastapi_crudrouter/core/_utils.py
+++ b/fastapi_crudrouter/core/_utils.py
@@ -25,11 +25,10 @@ def schema_factory(
     """
     Is used to create a CreateSchema which does not contain pk
     """
-
     fields = {
         f.name: (f.type_, ...)
         for f in schema_cls.__fields__.values()
-        if f.name != pk_field_name
+        if f.name != pk_field_name and f.field_info.allow_mutation
     }
 
     name = schema_cls.__name__ + name
diff --git a/tests/test_schema.py b/tests/test_schema.py
new file mode 100644
index 00000000..5edaf6a8
--- /dev/null
+++ b/tests/test_schema.py
@@ -0,0 +1,19 @@
+from pydantic import BaseModel, Field
+from fastapi_crudrouter.core._utils import schema_factory
+
+
+class Onion(BaseModel):
+    id: int = Field(primary_key=True)
+    variety: str
+    expire_on: str = Field(allow_mutation=False)
+
+    class Config:
+        validate_assignment = True
+
+
+class TestAllowMutation:
+    def test_schema_factory_update(self):
+        """Field annotation allow_mutation=False are removed from schema."""
+        schema = schema_factory(Onion, "Update")
+        assert "variety" in schema.__fields__
+        assert "expire_on" not in schema.__fields__