diff --git a/langchain/memory/entity.py b/langchain/memory/entity.py
index e2c1fddc..06fe1107 100644
--- a/langchain/memory/entity.py
+++ b/langchain/memory/entity.py
@@ -3,7 +3,6 @@ from typing import Any, Dict, List, Optional
 from pydantic import BaseModel
 
 from langchain.chains.llm import LLMChain
-from langchain.llms.base import BaseLLM
 from langchain.memory.chat_memory import BaseChatMemory
 from langchain.memory.prompt import (
     ENTITY_EXTRACTION_PROMPT,
@@ -11,7 +10,7 @@ from langchain.memory.prompt import (
 )
 from langchain.memory.utils import get_buffer_string, get_prompt_input_key
 from langchain.prompts.base import BasePromptTemplate
-from langchain.schema import BaseMessage
+from langchain.schema import BaseLanguageModel, BaseMessage
 
 
 class ConversationEntityMemory(BaseChatMemory, BaseModel):
@@ -19,7 +18,7 @@ class ConversationEntityMemory(BaseChatMemory, BaseModel):
 
     human_prefix: str = "Human"
     ai_prefix: str = "AI"
-    llm: BaseLLM
+    llm: BaseLanguageModel
     entity_extraction_prompt: BasePromptTemplate = ENTITY_EXTRACTION_PROMPT
     entity_summarization_prompt: BasePromptTemplate = ENTITY_SUMMARIZATION_PROMPT
     store: Dict[str, Optional[str]] = {}
diff --git a/langchain/memory/kg.py b/langchain/memory/kg.py
index f8036de0..a6a23402 100644
--- a/langchain/memory/kg.py
+++ b/langchain/memory/kg.py
@@ -5,7 +5,6 @@ from pydantic import BaseModel, Field
 from langchain.chains.llm import LLMChain
 from langchain.graphs import NetworkxEntityGraph
 from langchain.graphs.networkx_graph import KnowledgeTriple, get_entities, parse_triples
-from langchain.llms.base import BaseLLM
 from langchain.memory.chat_memory import BaseChatMemory
 from langchain.memory.prompt import (
     ENTITY_EXTRACTION_PROMPT,
@@ -13,7 +12,7 @@ from langchain.memory.prompt import (
 )
 from langchain.memory.utils import get_buffer_string, get_prompt_input_key
 from langchain.prompts.base import BasePromptTemplate
-from langchain.schema import SystemMessage
+from langchain.schema import BaseLanguageModel, SystemMessage
 
 
 class ConversationKGMemory(BaseChatMemory, BaseModel):
@@ -29,7 +28,7 @@ class ConversationKGMemory(BaseChatMemory, BaseModel):
     kg: NetworkxEntityGraph = Field(default_factory=NetworkxEntityGraph)
     knowledge_extraction_prompt: BasePromptTemplate = KNOWLEDGE_TRIPLE_EXTRACTION_PROMPT
     entity_extraction_prompt: BasePromptTemplate = ENTITY_EXTRACTION_PROMPT
-    llm: BaseLLM
+    llm: BaseLanguageModel
     """Number of previous utterances to include in the context."""
     memory_key: str = "history"  #: :meta private:
 
diff --git a/langchain/memory/summary.py b/langchain/memory/summary.py
index 7056274f..136c4f73 100644
--- a/langchain/memory/summary.py
+++ b/langchain/memory/summary.py
@@ -3,18 +3,17 @@ from typing import Any, Dict, List
 from pydantic import BaseModel, root_validator
 
 from langchain.chains.llm import LLMChain
-from langchain.llms.base import BaseLLM
 from langchain.memory.chat_memory import BaseChatMemory
 from langchain.memory.prompt import SUMMARY_PROMPT
 from langchain.memory.utils import get_buffer_string
 from langchain.prompts.base import BasePromptTemplate
-from langchain.schema import BaseMessage, SystemMessage
+from langchain.schema import BaseLanguageModel, BaseMessage, SystemMessage
 
 
 class SummarizerMixin(BaseModel):
     human_prefix: str = "Human"
     ai_prefix: str = "AI"
-    llm: BaseLLM
+    llm: BaseLanguageModel
     prompt: BasePromptTemplate = SUMMARY_PROMPT
 
     def predict_new_summary(