diff --git a/metagpt/rag/factories/ranker.py b/metagpt/rag/factories/ranker.py
index 476fe8c1a..b40085eec 100644
--- a/metagpt/rag/factories/ranker.py
+++ b/metagpt/rag/factories/ranker.py
@@ -3,7 +3,9 @@
 from llama_index.core.llms import LLM
 from llama_index.core.postprocessor import LLMRerank
 from llama_index.core.postprocessor.types import BaseNodePostprocessor
-
+from llama_index.postprocessor.colbert_rerank import ColbertRerank
+from llama_index.postprocessor.cohere_rerank import CohereRerank
+from llama_index.postprocessor.flag_embedding_reranker import FlagEmbeddingReranker
 from metagpt.rag.factories.base import ConfigBasedFactory
 from metagpt.rag.rankers.object_ranker import ObjectSortPostprocessor
 from metagpt.rag.schema import (
@@ -11,6 +13,8 @@ from metagpt.rag.schema import (
     ColbertRerankConfig,
     LLMRankerConfig,
     ObjectRankerConfig,
+    CohereRerankConfig,
+    FlagEmbeddingConfig
 )
 
 
@@ -22,6 +26,8 @@ class RankerFactory(ConfigBasedFactory):
             LLMRankerConfig: self._create_llm_ranker,
             ColbertRerankConfig: self._create_colbert_ranker,
             ObjectRankerConfig: self._create_object_ranker,
+            CohereRerankConfig: self._create_cohere_rerank,
+            FlagEmbeddingConfig: self._create_flag_rerank,
         }
         super().__init__(creators)
 
@@ -48,6 +54,13 @@ class RankerFactory(ConfigBasedFactory):
     def _create_object_ranker(self, config: ObjectRankerConfig, **kwargs) -> LLMRerank:
         return ObjectSortPostprocessor(**config.model_dump())
 
+    def _create_cohere_rerank(self, config: CohereRerankConfig, **kwargs) -> LLMRerank:
+        return CohereRerank(**config.model_dump())
+
+    def _create_flag_rerank(self, config: FlagEmbeddingReranker, **kwargs) -> LLMRerank:
+        return FlagEmbeddingReranker(**config.model_dump())
+
+
     def _extract_llm(self, config: BaseRankerConfig = None, **kwargs) -> LLM:
         return self._val_from_config_or_kwargs("llm", config, **kwargs)