diff --git a/src/platform/windows.rs b/src/platform/windows.rs
index 11145ecb1..d4a46d4b2 100644
--- a/src/platform/windows.rs
+++ b/src/platform/windows.rs
@@ -105,6 +105,9 @@ pub fn get_cursor_data(hcursor: u64) -> ResultType<CursorData> {
             bm_mask.bmHeight / 2
         };
         let cbits_size = width * height * 4;
+        if cbits_size < 16 {
+            bail!("Invalid icon: too small"); // solve some crash
+        }
         let mut cbits: Vec<u8> = Vec::new();
         cbits.resize(cbits_size as _, 0);
         let mut mbits: Vec<u8> = Vec::new();
diff --git a/src/server/audio_service.rs b/src/server/audio_service.rs
index d903eefe2..d77e0c633 100644
--- a/src/server/audio_service.rs
+++ b/src/server/audio_service.rs
@@ -198,6 +198,7 @@ mod cpal_impl {
             log::error!("an error occurred on stream: {}", err);
         };
         // Sample rate must be one of 8000, 12000, 16000, 24000, or 48000.
+        // Note: somehow 48000 not work
         let sample_rate_0 = config.sample_rate().0;
         let sample_rate = if sample_rate_0 < 12000 {
             8000
@@ -205,10 +206,8 @@ mod cpal_impl {
             12000
         } else if sample_rate_0 < 24000 {
             16000
-        } else if sample_rate_0 < 48000 {
-            24000
         } else {
-            48000
+            24000
         };
         let mut encoder = Encoder::new(
             sample_rate,