diff --git a/docs/docs/expression_language/how_to/message_history.ipynb b/docs/docs/expression_language/how_to/message_history.ipynb
index 751b1afcbebf4..aac305d7ac94c 100644
--- a/docs/docs/expression_language/how_to/message_history.ipynb
+++ b/docs/docs/expression_language/how_to/message_history.ipynb
@@ -34,7 +34,6 @@
     "from langchain_core.prompts import ChatPromptTemplate, MessagesPlaceholder\n",
     "from langchain_openai.chat_models import ChatOpenAI\n",
     "\n",
-    "\n",
     "model = ChatOpenAI()\n",
     "prompt = ChatPromptTemplate.from_messages(\n",
     "    [\n",
@@ -86,7 +85,6 @@
     "from langchain_core.chat_history import BaseChatMessageHistory\n",
     "from langchain_core.runnables.history import RunnableWithMessageHistory\n",
     "\n",
-    "\n",
     "store = {}\n",
     "\n",
     "\n",
@@ -205,7 +203,6 @@
    "source": [
     "from langchain_core.runnables import ConfigurableFieldSpec\n",
     "\n",
-    "\n",
     "store = {}\n",
     "\n",
     "\n",
@@ -293,7 +290,6 @@
     "from langchain_core.messages import HumanMessage\n",
     "from langchain_core.runnables import RunnableParallel\n",
     "\n",
-    "\n",
     "chain = RunnableParallel({\"output_message\": ChatOpenAI()})\n",
     "\n",
     "\n",