diff --git a/src/azure/chatgpt.rs b/src/azure/chatgpt.rs
index 482db06..ee9721e 100644
--- a/src/azure/chatgpt.rs
+++ b/src/azure/chatgpt.rs
@@ -252,6 +252,7 @@ async fn read_sse_response(http_response: Response, tx: &mpsc::Sender<String>) -
                 if let Some(finish_reason) = stream_choice.finish_reason {
                     choice.finish_reason = finish_reason;
                     if choice.finish_reason == "stop" {
+                        // chatgpt doesn't return '\n' at end of message
                         tx.send("\n".to_string()).await?;
                     }
                 }
diff --git a/src/command/complete.rs b/src/command/complete.rs
index e4761be..f160c2e 100644
--- a/src/command/complete.rs
+++ b/src/command/complete.rs
@@ -95,7 +95,7 @@ impl Complete {
             if !message.is_empty() {
                 return Err(anyhow!("system message must be at first"));
             }
-            if let Some(option) = parse_option(line) {
+            if let Some(option) = parse_option(line)? {
                 info!("option: {:?}", option);
                 model.option(option);
             }
@@ -171,13 +171,13 @@ async fn add_message(model: &mut llm::Model, state: &ParserState, message: Strin
     Ok(())
 }
 
-fn parse_option(line: &str) -> Option<ChatOption> {
-    let regex = Regex::new(r".*temperature=(\d+\.\d+).*").unwrap();
+fn parse_option(line: &str) -> Result<Option<ChatOption>> {
+    let regex = Regex::new(r".*temperature=(\d+\.\d+).*")?;
     if let Some(capture) = regex.captures(line) {
-        let temperature = f32::from_str(&capture[1]).unwrap();
-        Some(ChatOption { temperature })
+        let temperature = f32::from_str(&capture[1])?;
+        Ok(Some(ChatOption { temperature }))
     } else {
-        None
+        Ok(None)
     }
 }
 
@@ -194,6 +194,6 @@ mod tests {
     #[test]
     fn parse_option() {
         let option = super::parse_option("# system, temperature=2.0, top_p=0.95");
-        assert_eq!(option.unwrap().temperature, 2.0);
+        assert_eq!(option.unwrap().unwrap().temperature, 2.0);
     }
 }