diff --git a/crates/voicevox_core/src/__internal/interop/raii.rs b/crates/voicevox_core/src/__internal/interop/raii.rs
index 2423d6bb7..34eee4844 100644
--- a/crates/voicevox_core/src/__internal/interop/raii.rs
+++ b/crates/voicevox_core/src/__internal/interop/raii.rs
@@ -37,7 +37,7 @@ where
         marker: PhantomData<&'lock &'target ()>,
     }
 
-    impl<'lock, 'target: 'lock, G: 'lock, T: 'target> Deref for MappedLock<'lock, 'target, G, T> {
+    impl<'lock, 'target, G: 'lock, T: 'target> Deref for MappedLock<'lock, 'target, G, T> {
         type Target = T;
 
         fn deref(&self) -> &Self::Target {