diff --git a/src/time.rs b/src/time.rs
index 6e0d522..bc9303a 100644
--- a/src/time.rs
+++ b/src/time.rs
@@ -1,4 +1,5 @@
-use std::time::{Instant, Duration};
+use core::time::Duration;
+use std::time::Instant;
 
 #[derive(Debug, Clone, Copy)]
 pub struct Periodically {