diff --git a/src/task.rs b/src/task.rs
index e9900e4..2848897 100644
--- a/src/task.rs
+++ b/src/task.rs
@@ -22,7 +22,7 @@ struct ScheduledTask {
     task: Box<dyn Task>,
 }
 
-impl std::fmt::Debug for ScheduledTask {
+impl core::fmt::Debug for ScheduledTask {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("ScheduledTask")
             .field("task", &self.task.name())