diff --git a/backend-python/routes/completion.py b/backend-python/routes/completion.py
index 6bbd5c5..e0beb93 100644
--- a/backend-python/routes/completion.py
+++ b/backend-python/routes/completion.py
@@ -70,10 +70,10 @@ class ChatCompletionBody(ModelConfigBody):
                 "assistant_name": None,
                 "presystem": True,
                 "max_tokens": 1000,
-                "temperature": 1.2,
-                "top_p": 0.5,
-                "presence_penalty": 0.4,
-                "frequency_penalty": 0.4,
+                "temperature": 1,
+                "top_p": 0.3,
+                "presence_penalty": 0,
+                "frequency_penalty": 1,
             }
         }
     }
@@ -94,10 +94,10 @@ class CompletionBody(ModelConfigBody):
                 "stream": False,
                 "stop": None,
                 "max_tokens": 100,
-                "temperature": 1.2,
-                "top_p": 0.5,
-                "presence_penalty": 0.4,
-                "frequency_penalty": 0.4,
+                "temperature": 1,
+                "top_p": 0.3,
+                "presence_penalty": 0,
+                "frequency_penalty": 1,
             }
         }
     }
diff --git a/backend-python/utils/rwkv.py b/backend-python/utils/rwkv.py
index 2f61522..c9781b9 100644
--- a/backend-python/utils/rwkv.py
+++ b/backend-python/utils/rwkv.py
@@ -39,6 +39,7 @@ class AbstractRWKV(ABC):
         self.top_k = 0
         self.penalty_alpha_presence = 0
         self.penalty_alpha_frequency = 1
+        self.penalty_decay = 0.996
 
     @abstractmethod
     def adjust_occurrence(self, occurrence: Dict, token: int):
@@ -382,7 +383,7 @@ class TextRWKV(AbstractRWKV):
 
     def adjust_occurrence(self, occurrence: Dict, token: int):
         for xxx in occurrence:
-            occurrence[xxx] *= 0.996
+            occurrence[xxx] *= self.penalty_decay
         if token not in occurrence:
             occurrence[token] = 1
         else:
@@ -399,7 +400,7 @@ class TextRWKV(AbstractRWKV):
             for token in self.model_tokens:
                 token = int(token)
                 for xxx in occurrence:
-                    occurrence[xxx] *= 0.996
+                    occurrence[xxx] *= self.penalty_decay
                 if token not in occurrence:
                     occurrence[token] = 1
                 else:
@@ -664,15 +665,18 @@ class ModelConfigBody(BaseModel):
     top_p: float = Field(default=None, ge=0, le=1)
     presence_penalty: float = Field(default=None, ge=-2, le=2)
     frequency_penalty: float = Field(default=None, ge=-2, le=2)
+    penalty_decay: float = Field(default=None, ge=0.99, le=0.999)
+    top_k: int = Field(default=None, ge=0, le=25)
 
     model_config = {
         "json_schema_extra": {
             "example": {
                 "max_tokens": 1000,
-                "temperature": 1.2,
-                "top_p": 0.5,
-                "presence_penalty": 0.4,
-                "frequency_penalty": 0.4,
+                "temperature": 1,
+                "top_p": 0.3,
+                "presence_penalty": 0,
+                "frequency_penalty": 1,
+                "penalty_decay": 0.996,
             }
         }
     }
@@ -692,6 +696,10 @@ def set_rwkv_config(model: AbstractRWKV, body: ModelConfigBody):
         model.penalty_alpha_presence = body.presence_penalty
     if body.frequency_penalty is not None:
         model.penalty_alpha_frequency = body.frequency_penalty
+    if body.penalty_decay is not None:
+        model.penalty_decay = body.penalty_decay
+    if body.top_k is not None:
+        model.top_k = body.top_k
 
 
 def get_rwkv_config(model: AbstractRWKV) -> ModelConfigBody:
@@ -701,4 +709,6 @@ def get_rwkv_config(model: AbstractRWKV) -> ModelConfigBody:
         top_p=model.top_p,
         presence_penalty=model.penalty_alpha_presence,
         frequency_penalty=model.penalty_alpha_frequency,
+        penalty_decay=model.penalty_decay,
+        top_k=model.top_k,
     )