diff --git a/private_gpt/server/chat/chat_service.py b/private_gpt/server/chat/chat_service.py
index 09dd1a2e..724980f3 100644
--- a/private_gpt/server/chat/chat_service.py
+++ b/private_gpt/server/chat/chat_service.py
@@ -7,11 +7,9 @@ from llama_index.core.chat_engine.types import (
 )
 from llama_index.core.indices import VectorStoreIndex
 from llama_index.core.indices.postprocessor import MetadataReplacementPostProcessor
+from llama_index.core.postprocessor import SimilarityPostprocessor
+from llama_index.core.postprocessor import KeywordNodePostprocessor
 from llama_index.core.llms import ChatMessage, MessageRole
-from llama_index.core.postprocessor import (
-    KeywordNodePostprocessor,
-    SimilarityPostprocessor,
-)
 from llama_index.core.storage import StorageContext
 from llama_index.core.types import TokenGen
 from pydantic import BaseModel
@@ -26,7 +24,6 @@ from private_gpt.open_ai.extensions.context_filter import ContextFilter
 from private_gpt.server.chunks.chunks_service import Chunk
 from private_gpt.settings.settings import settings
 
-
 class Completion(BaseModel):
     response: str
     sources: list[Chunk] | None = None
@@ -107,45 +104,31 @@ class ChatService:
             vector_index_retriever = self.vector_store_component.get_retriever(
                 index=self.index, context_filter=context_filter
             )
-            # Initialize node_postporcessors
-            node_postprocessors_tmp: list[
-                MetadataReplacementPostProcessor
-                | SimilarityPostprocessor
-                | KeywordNodePostprocessor
-            ]
-            node_postprocessors_tmp = [
-                MetadataReplacementPostProcessor(target_metadata_key="window"),
-            ]
-            # If similarity value is set, use it.  If not, dont add it
-            if settings().llm.similarity_value is not None:
-                node_postprocessors_tmp.append(
-                    SimilarityPostprocessor(
-                        similarity_cutoff=settings().llm.similarity_value
-                    )
-                )
 
-            # If similarity value is set, use it.  If not, dont add it
-            # if settings().llm.keywords_include is not empty or
-            # settings().llm.keywords_exclude is not empty
+            #To use the keyword search, you must install spacy:
+            # pip install spacy
             if settings().llm.keywords_include or settings().llm.keywords_exclude:
-                node_postprocessors_tmp.append(
-                    KeywordNodePostprocessor(
-                        required_keywords=settings().llm.keywords_include,
-                        exclude_keywords=settings().llm.keywords_exclude,
-                    )
+                return ContextChatEngine.from_defaults(
+                    system_prompt=system_prompt,
+                    retriever=vector_index_retriever,
+                    llm=self.llm_component.llm,  # Takes no effect at the moment
+                    node_postprocessors=[
+                        MetadataReplacementPostProcessor(target_metadata_key="window"),
+                        SimilarityPostprocessor(similarity_cutoff=settings().llm.similarity_value),
+                        KeywordNodePostprocessor(required_keywords=settings().llm.keywords_include, exclude_keywords=settings().llm.keywords_exclude),
+                    ],
+                )
+            else:
+                return ContextChatEngine.from_defaults(
+                    system_prompt=system_prompt,
+                    retriever=vector_index_retriever,
+                    llm=self.llm_component.llm,  # Takes no effect at the moment
+                    node_postprocessors=[
+                        MetadataReplacementPostProcessor(target_metadata_key="window"),
+                        SimilarityPostprocessor(similarity_cutoff=settings().llm.similarity_value),
+                    ],
                 )
 
-            return ContextChatEngine.from_defaults(
-                system_prompt=system_prompt,
-                retriever=vector_index_retriever,
-                llm=self.llm_component.llm,  # Takes no effect at the moment
-                node_postprocessors=[
-                    MetadataReplacementPostProcessor(target_metadata_key="window"),
-                    SimilarityPostprocessor(
-                        similarity_cutoff=settings().llm.similarity_value
-                    ),
-                ],
-            )
         else:
             return SimpleChatEngine.from_defaults(
                 system_prompt=system_prompt,