diff --git a/ce_ranker.py b/ce_ranker.py
index 81e937a..fbe68d9 100644
--- a/ce_ranker.py
+++ b/ce_ranker.py
@@ -8,7 +8,6 @@ import weaviate
 
 load_dotenv()
 
-
 class RelevanceAssessment(dspy.Signature):
     """Assess the relevance of a document to a query."""
     query: str = dspy.InputField()
@@ -17,9 +16,10 @@ class RelevanceAssessment(dspy.Signature):
 
 
 class CERankerConfig(PrecompiledConfig):
-    lm: str = "openai/gpt-4.1-mini"
     collection_name: str
     return_properties: list[str]
+    k: int
+    lm: str = "openai/gpt-4.1-mini"
 
 
 class CERankerAgent(PrecompiledAgent):
@@ -32,6 +32,7 @@ class CERankerAgent(PrecompiledAgent):
         dspy.configure(lm=lm)
         
         self._connect_to_weaviate()
+        self.k = config.k
         self.reranker = dspy.ChainOfThought(RelevanceAssessment)
 
     def _connect_to_weaviate(self):
@@ -47,8 +48,11 @@ class CERankerAgent(PrecompiledAgent):
         result = await self.reranker.acall(query=query, document=document)
         return (document, result.relevance_score)
 
-    async def __acall__(self, query: str, k: int = 1) -> str:
-        response = self.collection.query.hybrid(query=query, limit=k)
+    async def __acall__(self, query: str, k: int | None = None) -> str:
+        if k is None:
+            k = self.k
+            
+        response = self.collection.query.hybrid(query=query, limit=self.k)
         
         documents = [o.properties["content"] for o in response.objects]
         
@@ -58,16 +62,17 @@ class CERankerAgent(PrecompiledAgent):
         
         scored_results.sort(key=lambda x: x[1], reverse=True)
         
-        return "\n".join([doc for doc, score in scored_results[:k]])
+        return "\n".join([doc for doc, score in scored_results[:self.k]])
 
-    def __call__(self, query: str, k: int = 1) -> str:
+    def __call__(self, query: str, k: int | None = None) -> str:            
         return asyncio.run(self.__acall__(query, k))
 
 
 if __name__ == "__main__":
     config = CERankerConfig(
         collection_name="IRPapersText_Default",
-        return_properties=["content"]
+        return_properties=["content"],
+        k=5
     )
     agent = CERankerAgent(config)
     print(agent(query="What is HyDE?"))
diff --git a/config.json b/config.json
index 5c2646d..1f67b53 100644
--- a/config.json
+++ b/config.json
@@ -1,7 +1,8 @@
 {
-  "lm": "openai/gpt-4.1-mini",
   "collection_name": "IRPapersText_Default",
   "return_properties": [
     "content"
-  ]
+  ],
+  "k": 5,
+  "lm": "openai/gpt-4.1-mini"
 }
\ No newline at end of file