diff --git a/Cargo.lock b/Cargo.lock
index 5dafdc2..d356602 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -96,6 +96,7 @@ dependencies = [
  "unicode-segmentation",
  "unicode-width",
  "urlencoding",
+ "uuid",
 ]
 
 [[package]]
@@ -2945,6 +2946,15 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 
+[[package]]
+name = "uuid"
+version = "1.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5de17fd2f7da591098415cff336e12965a28061ddace43b59cb3c430179c9439"
+dependencies = [
+ "getrandom",
+]
+
 [[package]]
 name = "valuable"
 version = "0.1.0"
diff --git a/Cargo.toml b/Cargo.toml
index f5f788e..30045c0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -60,6 +60,7 @@ bitflags = "2.5.0"
 path-absolutize = "3.1.1"
 hnsw_rs = "0.3.0"
 rayon = "1.10.0"
+uuid = { version = "1.9.1", features = ["v4"] }
 
 [dependencies.reqwest]
 version = "0.12.0"
diff --git a/config.example.yaml b/config.example.yaml
index 2f371dd..28b5992 100644
--- a/config.example.yaml
+++ b/config.example.yaml
@@ -34,7 +34,7 @@ document_loaders:
   docx: 'pandoc --to plain $1'                  # Load .docx file
   # xlsx: 'ssconvert $1 $2'                     # Load .xlsx file
   # html: 'pandoc --to plain $1'                # Load .html file
-  # recursive_url: 'rag-crawler $1 $2.json'     # Load websites, see https://github.com/sigoden/rag-crawler
+  # recursive_url: 'rag-crawler $1 $2'          # Load websites, see https://github.com/sigoden/rag-crawler
 
 # ---- function-calling & agent ----
 # Controls the function calling feature. For setup instructions, visit https://github.com/sigoden/llm-functions
diff --git a/src/repl/mod.rs b/src/repl/mod.rs
index 360af70..6c15002 100644
--- a/src/repl/mod.rs
+++ b/src/repl/mod.rs
@@ -10,7 +10,7 @@ use crate::client::chat_completion_streaming;
 use crate::config::{AssertState, Config, GlobalConfig, Input, StateFlags};
 use crate::function::need_send_tool_results;
 use crate::render::render_error;
-use crate::utils::{create_abort_signal, set_text, AbortSignal};
+use crate::utils::{create_abort_signal, set_text, temp_file, AbortSignal};
 
 use anyhow::{bail, Context, Result};
 use async_recursion::async_recursion;
@@ -415,8 +415,7 @@ Type ".help" for additional help.
             .with_ansi_colors(true);
 
         if let Some(cmd) = config.read().buffer_editor() {
-            let temp_file =
-                env::temp_dir().join(format!("aichat-{}.txt", chrono::Utc::now().timestamp()));
+            let temp_file = temp_file("-repl-", ".txt");
             let command = process::Command::new(cmd);
             editor = editor.with_buffer_editor(command, temp_file);
         }
diff --git a/src/utils/command.rs b/src/utils/command.rs
index 1a7de5b..3876f3d 100644
--- a/src/utils/command.rs
+++ b/src/utils/command.rs
@@ -98,10 +98,7 @@ pub fn run_loader_command(path: &str, extension: &str, loader_command: &str) ->
         anyhow!("Invalid rag document loader '{extension}': `{loader_command}`")
     })?;
     let mut use_stdout = true;
-    let outpath = env::temp_dir()
-        .join(format!("aichat-output-{}", sha256(path)))
-        .display()
-        .to_string();
+    let outpath = temp_file("-output-", "").display().to_string();
     let cmd_args: Vec<_> = cmd_args
         .into_iter()
         .map(|mut v| {
diff --git a/src/utils/mod.rs b/src/utils/mod.rs
index e36a54b..548c6f1 100644
--- a/src/utils/mod.rs
+++ b/src/utils/mod.rs
@@ -38,8 +38,8 @@ pub fn now() -> String {
 pub fn get_env_name(key: &str) -> String {
     format!(
         "{}_{}",
-        env!("CARGO_CRATE_NAME").to_ascii_uppercase(),
-        key.to_ascii_uppercase(),
+        env!("CARGO_CRATE_NAME").to_uppercase(),
+        key.to_uppercase(),
     )
 }
 
@@ -183,6 +183,14 @@ pub fn safe_join_path<T1: AsRef<Path>, T2: AsRef<Path>>(
     }
 }
 
+pub fn temp_file(prefix: &str, suffix: &str) -> PathBuf {
+    env::temp_dir().join(format!(
+        "{}{prefix}{}{suffix}",
+        env!("CARGO_CRATE_NAME").to_lowercase(),
+        uuid::Uuid::new_v4()
+    ))
+}
+
 pub fn set_proxy(
     builder: reqwest::ClientBuilder,
     proxy: Option<&String>,
diff --git a/src/utils/request.rs b/src/utils/request.rs
index bc5388c..fadd3b8 100644
--- a/src/utils/request.rs
+++ b/src/utils/request.rs
@@ -3,7 +3,7 @@ use super::*;
 use anyhow::{bail, Result};
 use http::header::CONTENT_TYPE;
 use lazy_static::lazy_static;
-use std::{collections::HashMap, env, time::Duration};
+use std::{collections::HashMap, time::Duration};
 use tokio::io::AsyncWriteExt;
 
 pub const URL_LOADER: &str = "url";
@@ -48,10 +48,7 @@ pub async fn fetch(loaders: &HashMap<String, String>, path: &str) -> Result<(Str
     }
     let result = match loaders.get(&extension) {
         Some(loader_command) => {
-            let save_path = env::temp_dir()
-                .join(format!("aichat-download-{}.{extension}", sha256(path)))
-                .display()
-                .to_string();
+            let save_path = temp_file("-download-", "").display().to_string();
             let mut save_file = tokio::fs::File::create(&save_path).await?;
             let mut size = 0;
             while let Some(chunk) = res.chunk().await? {