diff --git a/Readme.md b/Readme.md
index ecc8939..b90fadd 100644
--- a/Readme.md
+++ b/Readme.md
@@ -14,6 +14,8 @@ A multilingual dictionary based on ChatGPT
 
 去 [OpenAI 官网](https://platform.openai.com/account/api-keys)申请 API Key
 
+注意，你的OpenAI的API账户里应有余额。即此软件不是免费的，但不是给我钱而是给OpenAI。
+
 添加`OPENAI_API_KEY`到环境变量
 
 ### Windows
diff --git a/Readme_en.md b/Readme_en.md
index 21cb9da..7e533cc 100644
--- a/Readme_en.md
+++ b/Readme_en.md
@@ -10,6 +10,8 @@ Download the software from the releases
 
 Apply for an API Key at [OpenAI's official website](https://platform.openai.com/account/api-keys)
 
+Please note that your OpenAI API account should have sufficient balance. This software is not free, and the payment goes to OpenAI, not to me.
+
 Add `OPENAI_API_KEY` to the environment variables
 
 ### Windows