diff --git a/api/core/model_providers/models/reranking/cohere_reranking.py b/api/core/model_providers/models/reranking/cohere_reranking.py
index e5b2fe61d1..fa2748734d 100644
--- a/api/core/model_providers/models/reranking/cohere_reranking.py
+++ b/api/core/model_providers/models/reranking/cohere_reranking.py
@@ -24,7 +24,10 @@ class CohereReranking(BaseReranking):
 
         super().__init__(model_provider, client, name)
 
-    def rerank(self, query: str, documents: List[Document], score_threshold: Optional[float], top_k: Optional[int]) -> Optional[List[Document]]:
+    def rerank(self, query: str, documents: List[Document], score_threshold: Optional[float], top_k: Optional[int]) -> \
+            Optional[List[Document]]:
+        if not documents:
+            return []
         docs = []
         doc_id = []
         unique_documents = []
@@ -34,7 +37,7 @@ class CohereReranking(BaseReranking):
                 docs.append(document.page_content)
                 unique_documents.append(document)
         documents = unique_documents
-        
+
         results = self.client.rerank(query=query, documents=docs, model=self.name, top_n=top_k)
         rerank_documents = []
 
diff --git a/api/core/model_providers/models/reranking/xinference_reranking.py b/api/core/model_providers/models/reranking/xinference_reranking.py
index 0ae9eaec6e..fda2772c70 100644
--- a/api/core/model_providers/models/reranking/xinference_reranking.py
+++ b/api/core/model_providers/models/reranking/xinference_reranking.py
@@ -21,6 +21,8 @@ class XinferenceReranking(BaseReranking):
         super().__init__(model_provider, client, name)
 
     def rerank(self, query: str, documents: List[Document], score_threshold: Optional[float], top_k: Optional[int]) -> Optional[List[Document]]:
+        if not documents:
+            return []
         docs = []
         doc_id = []
         unique_documents = []