diff --git a/README.md b/README.md
index 00f0291..6d5036c 100644
--- a/README.md
+++ b/README.md
@@ -198,5 +198,7 @@ The changelog:
 * Support setup chat AI model for each robot. v1.0.24
 * Support setup chat window for each robot. [v1.0.25](https://github.com/ossrs/ai-talk/releases/tag/v1.0.25)
 * Alert error when not HTTPS. v1.0.26
+* Support HTTPS proxy for OpenAI. v1.0.27
+* Support official OpenAI API without proxy. [v1.0.28](https://github.com/ossrs/ai-talk/releases/tag/v1.0.28)
 
 Winlin, 2023.12
diff --git a/backend/main.go b/backend/main.go
index 33ae6ec..cec2a25 100644
--- a/backend/main.go
+++ b/backend/main.go
@@ -1302,7 +1302,7 @@ func doConfig(ctx context.Context) error {
 		if strings.Contains(proxy, "://") {
 			aiConfig.BaseURL = proxy
 		} else if strings.Contains(proxy, "openai.com") {
-			aiConfig.BaseURL = fmt.Sprintf("http://%v", proxy)
+			aiConfig.BaseURL = fmt.Sprintf("https://%v", proxy)
 		} else {
 			aiConfig.BaseURL = fmt.Sprintf("http://%v", proxy)
 		}