diff --git a/src/buffer.rs b/src/buffer.rs
index 46c8215..cd3efbd 100644
--- a/src/buffer.rs
+++ b/src/buffer.rs
@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: MIT OR Apache-2.0
 
+#[cfg(not(feature = "std"))]
+use alloc::{string::String, vec::Vec};
 use core::{cmp, fmt};
 use unicode_segmentation::UnicodeSegmentation;
 
diff --git a/src/buffer_line.rs b/src/buffer_line.rs
index ee10acc..015c5e8 100644
--- a/src/buffer_line.rs
+++ b/src/buffer_line.rs
@@ -1,3 +1,5 @@
+#[cfg(not(feature = "std"))]
+use alloc::{string::String, vec::Vec};
 use core::mem;
 
 use crate::{