diff --git a/llama_stack/apis/scoring/scoring.py b/llama_stack/apis/scoring/scoring.py
index a68582057..c2bfdcd23 100644
--- a/llama_stack/apis/scoring/scoring.py
+++ b/llama_stack/apis/scoring/scoring.py
@@ -48,7 +48,7 @@ class Scoring(Protocol):
     async def score_batch(
         self,
         dataset_id: str,
-        scoring_functions: Optional[Dict[str, ScoringFnParams]] = None,
+        scoring_functions: Dict[str, Optional[ScoringFnParams]] = None,
         save_results_dataset: bool = False,
     ) -> ScoreBatchResponse: ...
 
@@ -56,5 +56,5 @@ class Scoring(Protocol):
     async def score(
         self,
         input_rows: List[Dict[str, Any]],
-        scoring_functions: Optional[Dict[str, ScoringFnParams]] = None,
+        scoring_functions: Dict[str, Optional[ScoringFnParams]] = None,
     ) -> ScoreResponse: ...
diff --git a/llama_stack/distribution/routers/routers.py b/llama_stack/distribution/routers/routers.py
index 4b28a20d7..7fc65800f 100644
--- a/llama_stack/distribution/routers/routers.py
+++ b/llama_stack/distribution/routers/routers.py
@@ -212,7 +212,7 @@ class ScoringRouter(Scoring):
     async def score_batch(
         self,
         dataset_id: str,
-        scoring_functions: Optional[Dict[str, ScoringFnParams]] = None,
+        scoring_functions: Dict[str, Optional[ScoringFnParams]] = None,
         save_results_dataset: bool = False,
     ) -> ScoreBatchResponse:
         res = {}
@@ -235,7 +235,7 @@ class ScoringRouter(Scoring):
     async def score(
         self,
         input_rows: List[Dict[str, Any]],
-        scoring_functions: Optional[Dict[str, ScoringFnParams]] = None,
+        scoring_functions: Dict[str, Optional[ScoringFnParams]] = None,
     ) -> ScoreResponse:
         res = {}
         # look up and map each scoring function to its provider impl
diff --git a/llama_stack/providers/inline/meta_reference/scoring/scoring.py b/llama_stack/providers/inline/meta_reference/scoring/scoring.py
index d6eb3ae96..c4add966d 100644
--- a/llama_stack/providers/inline/meta_reference/scoring/scoring.py
+++ b/llama_stack/providers/inline/meta_reference/scoring/scoring.py
@@ -96,7 +96,7 @@ class MetaReferenceScoringImpl(Scoring, ScoringFunctionsProtocolPrivate):
     async def score_batch(
         self,
         dataset_id: str,
-        scoring_functions: Optional[Dict[str, ScoringFnParams]] = None,
+        scoring_functions: Dict[str, Optional[ScoringFnParams]] = None,
         save_results_dataset: bool = False,
     ) -> ScoreBatchResponse:
         await self.validate_scoring_input_dataset_schema(dataset_id=dataset_id)
@@ -120,7 +120,7 @@ class MetaReferenceScoringImpl(Scoring, ScoringFunctionsProtocolPrivate):
     async def score(
         self,
         input_rows: List[Dict[str, Any]],
-        scoring_functions: Optional[Dict[str, ScoringFnParams]] = None,
+        scoring_functions: Dict[str, Optional[ScoringFnParams]] = None,
     ) -> ScoreResponse:
         res = {}
         for scoring_fn_id in scoring_functions.keys():