diff --git a/crates/voicevox_core/src/publish.rs b/crates/voicevox_core/src/publish.rs
index 9684923b0..c7f710f18 100644
--- a/crates/voicevox_core/src/publish.rs
+++ b/crates/voicevox_core/src/publish.rs
@@ -205,19 +205,14 @@ impl From<&TtsOptions> for AudioQueryOptions {
     }
 }
 
-#[derive(Debug, PartialEq, Eq)]
+#[derive(Default, Debug, PartialEq, Eq)]
 pub enum AccelerationMode {
+    #[default]
     Auto,
     Cpu,
     Gpu,
 }
 
-impl Default for AccelerationMode {
-    fn default() -> Self {
-        Self::Auto
-    }
-}
-
 #[derive(Default)]
 pub struct InitializeOptions {
     pub acceleration_mode: AccelerationMode,