diff --git a/crates/pile-value/src/value/item.rs b/crates/pile-value/src/value/item.rs
index 0087e69..e4fc4a9 100644
--- a/crates/pile-value/src/value/item.rs
+++ b/crates/pile-value/src/value/item.rs
@@ -5,7 +5,7 @@ use std::{collections::HashMap, fs::File, path::PathBuf, sync::Arc};
 
 use crate::{
 	source::{DirDataSource, S3DataSource},
-	value::{ItemReader, S3Reader},
+	value::{ItemReader, S3Reader, SyncReadBridge},
 };
 
 //
@@ -74,7 +74,7 @@ impl Item {
 		match self {
 			Self::File { source, path, .. } => path
 				.strip_prefix(&source.dir)
-				.unwrap()
+				.expect("item must be inside source")
 				.to_str()
 				.expect("path is not utf-8")
 				.into(),
@@ -82,17 +82,16 @@ impl Item {
 		}
 	}
 
-	pub fn hash(&self) -> Result<blake3::Hash, std::io::Error> {
-		match self {
-			Self::File { path, .. } => {
-				let mut hasher = blake3::Hasher::new();
-				let mut file = std::fs::File::open(path)?;
-				std::io::copy(&mut file, &mut hasher)?;
-				return Ok(hasher.finalize());
-			}
-
-			Self::S3 { .. } => todo!(),
-		}
+	pub async fn hash(&self) -> Result<blake3::Hash, std::io::Error> {
+		let read = self.read().await?;
+		let mut read = SyncReadBridge::new_current(read);
+		let out = tokio::task::spawn_blocking(move || {
+			let mut hasher = blake3::Hasher::new();
+			std::io::copy(&mut read, &mut hasher)?;
+			return Ok::<_, std::io::Error>(hasher.finalize());
+		})
+		.await??;
+		return Ok(out);
 	}
 
 	pub fn mime(&self) -> &Mime {