diff --git a/crates/llm-ls/src/main.rs b/crates/llm-ls/src/main.rs
index f782d1f..472654d 100644
--- a/crates/llm-ls/src/main.rs
+++ b/crates/llm-ls/src/main.rs
@@ -15,9 +15,6 @@ use tracing::{error, info};
 use tracing_appender::rolling;
 use tracing_subscriber::EnvFilter;
 
-// TODO:
-// * handle slice panic
-
 #[derive(Clone, Debug, Deserialize, Serialize)]
 struct RequestParams {
     max_new_tokens: u32,
@@ -153,12 +150,13 @@ fn build_prompt(
         let mut before_iter = text.lines_at(pos.line as usize + 1).reversed();
         let mut after_iter = text.lines_at(pos.line as usize);
         let mut before_line = before_iter.next();
-        let col = pos.character as usize;
         if let Some(line) = before_line {
+            let col = (pos.character as usize).clamp(0, line.len_chars());
             before_line = Some(line.slice(0..col));
         }
         let mut after_line = after_iter.next();
         if let Some(line) = after_line {
+            let col = (pos.character as usize).clamp(0, line.len_chars());
             after_line = Some(line.slice(col..));
         }
         let mut before = vec![];
@@ -205,7 +203,8 @@ fn build_prompt(
         let mut first = true;
         for mut line in text.lines_at(pos.line as usize + 1).reversed() {
             if first {
-                line = line.slice(0..pos.character as usize);
+                let col = (pos.character as usize).clamp(0, line.len_chars());
+                line = line.slice(0..col);
                 first = false;
             }
             let line = line.to_string();