diff --git a/libs/langchain/langchain/chains/summarize/refine_prompts.py b/libs/langchain/langchain/chains/summarize/refine_prompts.py
index 5c67db48185..a70d1966184 100644
--- a/libs/langchain/langchain/chains/summarize/refine_prompts.py
+++ b/libs/langchain/langchain/chains/summarize/refine_prompts.py
@@ -4,12 +4,12 @@ from langchain.prompts import PromptTemplate
 REFINE_PROMPT_TMPL = (
     "Your job is to produce a final summary\n"
     "We have provided an existing summary up to a certain point: {existing_answer}\n"
-    "We have the opportunity to refine the existing summary"
+    "We have the opportunity to refine the existing summary "
     "(only if needed) with some more context below.\n"
     "------------\n"
     "{text}\n"
     "------------\n"
-    "Given the new context, refine the original summary\n"
+    "Given the new context, refine the original summary.\n"
     "If the context isn't useful, return the original summary."
 )
 REFINE_PROMPT = PromptTemplate(