diff --git a/src/main.ts b/src/main.ts
index f47a6b0..f73ea7f 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -83,6 +83,7 @@ function createPrompt(file: File, chunk: Chunk, prDetails: PRDetails): string {
   return `Your task is to review pull requests. Instructions:
 - Provide the response in following JSON format:  {"reviews": [{"lineNumber":  <line_number>, "reviewComment": "<review comment>"}]}
 - Do not give positive comments or compliments.
+- Provide review in Korean language.
 - Provide comments and suggestions ONLY if there is something to improve, otherwise "reviews" should be an empty array.
 - Write the comment in GitHub Markdown format.
 - Use the given description only for the overall context and only comment the code.